Although siblings Joaquin, River, and Liberty Phoenix were acting as early as 1982 and appeared in several movies and TV shows over the next few years, the world was first properly introduced to the talented family when River starred in the iconic 1986 coming-of-age film Stand By Me. He quickly established himself as one of the hottest "next big thing" actors around, earning an Oscar nomination for 1988's Running on Empty and playing young Indy in Indiana Jones and the Last Crusade.

At the same time, Joaquin was also slowly carving out his own acting career, appearing in Ron Howard's ensemble family comedy Parenthood. Their sisters were also slowly beefing up their resumes with appearances in hit movies and television shows. River was definitely the Phoenix family member to watch-- that is, until his untimely ing at 23 when he succumbed to his hard-partying Hollywood lifestyle.

After taking a break from acting, Joaquin eventually returned to the business with his role in Gus Van Sant's black comedy, and he hasn't really slowed down since, becoming one of Hollywood's most reliable actors over the last 20 years and counting.

But what about the Phoenix family itself? What's the deal with those unusual names? Is it true that they were once of a religious cult? Who are the parents of this eccentric family, and what have their less-famous daughters been up to?

Here are 15 Wild Secrets About River And Joaquin Phoenix's Family.

River and Joaquin Have Four Sisters

In the introduction, we teased Joaquin and River having sisters. Perhaps you're even familiar with them, or have seen them in movies and/or TV shows and not necessarily realized who they are. The Phoenix sisters are, in order of oldest to youngest: Rain, Liberty, and Summer. In case you were wondering, yes, all of the aforementioned Phoenix family names are their actual, legal names-- in fact, wait until you hear their middle names!

Rain Joan of Arc Phoenix, which is a proud name to have even if it doesn't exactly roll off the tongue, has mostly chosen music for her career path. While Rain has done some acting, appearing in movies like Shakespeare adaptation O and the Will Smith comedy Hitch, her most enduring ion has definitely been that of a musician.

Liberty Mariposa Phoenix has had the most low-key public life of any of the Phoenix children, quitting acting by age 10 and mostly doing fashion and charity work in recent years.

Lastly, Summer Joy Phoenix is the biggest actor of the Phoenix girls, with over two dozen film and television credits to her name including two feature films currently in post-production. She was also briefly married to a Hollywood A-lister.

Additionally, according to the Joaquin Phoenix biography He's Still Here, the Phoenix's also have a half-sister name Jodean via a relationship their father was in before meeting their mother.

Their Original Last Name Wasn't Phoenix

River Phoenix. Is there a more perfect name for a hot young Hollywood superstar in the late-80s and early-90s? Most people would've had to change their real name in order to have a name that cool. As it turns out, River's name was changed at a certain point-- but not his first name.

The late actor and musician actually had a rather amusing name for the first nine years of his life: River Bottom.

Fortunately, River's parents didn't try and make their subsequent children's names match that surname in a funny way-- he didn't have a sister named Apple or brother named Rock, hilarious as that would have been. In fact, in 1979, after youngest child Summer was born, parents John and Arlyn Bottom decided to change their family's last name to "Phoenix." The name was deliberately chosen for its mythical connotations of rising from the ashes, as the family was then at a point where they were looking for a rebirth of some kind after a few years of hardship.

The timing couldn't have been better, as it would only be three years before the Phoenix children began scoring professional acting gigs. Even from their earliest roles, none of them ever had acting credits using their original last names-- which means you aren't going to find any early-80s movies or TV shows with the name "River Bottom" in their cast lists.

River's Final Film Took 19 Years To Finish

Hollywood has many examples of actors who ed away during the production of a movie, leaving filmmakers to figure out creative ways to get it finished anyway. This unfortunate phenomenon was most recently seen when Paul Walker's brothers had to serve as his stand-in for some of his unfinished scenes in Furious 7 following his fatal car accident.

For as prolific of an actor River was becoming in his early-20s, it's actually somewhat surprising that he only left one unfinished movie behind when he lost his life at only 23-years-old. That film was Dark Blood, a thriller that co-starred veteran actors Judy Davis (Husbands and Wives) and Jonathan Pryce (Pirates of the Caribbean).

After being abandoned for almost two decades due to so many key scenes missing that River never got to shoot, director George Sluizer decided that the film could be salvaged and completed via some narration on his part to explain the missing plot points. Sluizer also reached out to Joaquin in the hopes that he could serve as a verbal stand-in for his brother during those narrations, but he-- along with the entire Phoenix family-- refused to participate in the film in any way.

Undeterred, Sluizer recut and completed Dark Blood, which premiered at several European film festivals in 2012. Though it never had a theatrical run -  nor has it been released on any home media in North America - as of this writing it can be seen in its entirety on YouTube.

Joaquin Brought Rain Along For His Big Comeback

Joaquin might not have had any big breakout roles in the '80s that made him a superstar household name like River was by the middle of the decade, but that isn't to say he wasn't a very busy working actor. By 1990, Joaquin had appeared in four feature films and nine TV shows, including Hill Street BluesMurder, She Wrote, and Superboy.

His career well-established, Joaquin then decided to take a break from acting to do some traveling with his father-- and when you're a teenager and you have the time, money, and freedom to do so, why wouldn't you? Then, following the ing of River-- and Joaquin's anger at the media constantly replaying his 911 call for help following River's collapse-- Joaquin took another year off from public life.

After nearly six years away from acting, Joaquin came roaring back with a vengeance via his head-turning role in Gus Van Sant's black comedy opposite Nicole Kidman. It was also the movie where he met Casey Affleck, who then became a longtime family friend.

There is a blink-and-you'll-miss-it appearance in the movie by none other than Joaquin's sister, Rain, playing an uncredited tambourine player in the movie.  

It's actually one of the only times that two Phoenix siblings appeared together in a project post-child acting days.

Joaquin Once Changed His Name To "Leaf"

As previously mentioned, Joaquin was quite the busy child actor. After his acting debut alongside River and Liberty in Seven Brides for Seven Brothers, Joaquin began to quickly rack up movie and television credits. Well, technically that isn't accurate-- it was "Leaf Phoenix" was the one accumulating those credits.

Doesn't it seem like Joaquin's name doesn't fit in with the theme of his siblings' names? They are all either named after something found in nature, or a word that represents some kind of positive ideal in the case of Liberty. Apparently, the reason for Joaquin's unique name is that he was born in Puerto Rico, and as such, his parents decided to give him a Latin-flavored name: Joaquin Rafael.

Not liking that his name was so different from that of his siblings, Joaquin took to referring to himself as Leaf around age five or six, not long after the family name change from Bottom to Phoenix (he was never "Leaf Bottom"). He chose Leaf because it had natural connotations like his siblings River, Rain, and Summer, and fit nicely with the new family surname.

In fact, Joaquin was so all-in on going by Leaf that his first handful of acting gigs saw him officially credited as "Leaf Phoenix," including his role in Parenthood. At age 15, he decided to go back to his birth name, both personally and professionally, which also served as a way to put a period at the end of his time as a child actor.

Their Dad Met Their Mom While She Was Hitchhiking

It's pretty easy to gather just from the names of their children that John and Arlyn Bottom/Phoenix were of the free-spirited, flower child mold. As such, the couple met in the post hippie-ish of ways-- via hitchhiking.

Arlyn had settled down for a bit when she first entered adulthood, taking the pretty safe path of living in New York with a husband who worked with computers. According to The Guardian, she quickly became restless with such a typical life, and did what many twentysomethings did in the 1960s-- traveled to and then hitchhiked across California, the epicenter of the flower power movement. It was during that trek to find herself that she met songwriter John Lee Bottom, who decided to pick up young Arlyn.

Even further cementing the couple's very of-the-era courtship, they were married within a year of their first meeting.

The newlyweds spent some time driving and picking fruit, becoming parents shortly after with the birth of River in 1970, followed by Rain two years later. Make no mistake: there is a lot to unpack about John and Arlyn's marriage and their lives as a family, especially in those early days, but it is way too much to get into in this entry. If you don't already know what we're alluding to, buckle up-- few families, famous or otherwise, have a story this wild.

The siblings were each born in a different place

The Bottoms led a very nomad existence, something that didn't slow down at all even once they started popping out kids. Few kids get to see as much of the world as the Bottoms did, especially those who aren't the children of military parents. Such was their mobility that each of John and Arlyn's five children together ended up being born not only in different U.S. states and/or territories, but in one case, a different country altogether.

Their first child was River, who was born in 1970 in Madras, Oregon. In just two years, the couple was all the way down in Crockett, Texas for the birth of second child-- and first daughter-- Rain. As we already discussed, child number three, Joaquin, calls Puerto Rico his birthplace (San Juan to be exact). Liberty, the only child born outside of the United States, entered the world by way of Caracas, Venezuela in 1976-- and actually, keeping with the reasoning behind Joaquin's name, her birth name was Libertad ("liberty" or "freedom" in Spanish), though she has gone by Liberty most of her life. Finally, bringing things back to the States, fifth and final child Summer was born in Winter Park, Florida.

For those keeping track, that is three U.S. states, one U.S. territory, and one different country altogether. That is a lot of "home cities" for a single family.

They Were Never Competitive With Each Other

With all of the Phoenix children being relatively close in age and, for a time, all trying their hands at an acting career, it stands to reason that they were often up for similar roles. After all, there are only so many projects that have room for multiple Phoenix children. Even in the closest-knit of families, that is sure to breed a certain level of competitiveness among a group of siblings.

Not so for the Phoenix clan, who by all s were nothing but ive of each other's careers and were each other's biggest cheerleaders. There was no bitterness when River's career skyrocketed, for instance-- Joaquin and his sisters couldn't have been more thrilled about their brother's success. Ditto for when Joaquin slowly began to carve out his own path into movies, with River being nothing but proud of his little bro's burgeoning career.

Much of the credit for this belongs to Arlyn and John, who clearly distilled a sense of familial love and in their children and never fostered an environment that bred competition.

That, and the fact that all of the Phoenix kids seem to be ridiculously talented, which always helps -- we won't name names, but we all know the famous families with multiple actors that don't get along the best, and most of the time, there is one that is clearly the "star" that rises above the rest.

Casey Affleck Married Into The Family

Around 2008 or so, Joaquin seemed to be in the middle of a public breakdown, or at least a bizarre Garth Brooks/Chris Gaines-type of ill-advised vanity project. He grew some very bushy facial hair-- which actually hammered home how much he favors his father, John-- and began appearing on talk shows with a strange, low-key demeanor - insisting he was quitting acting to become a rapper. It all ended up being a stunt for a faux-documentary he was creating, directed by Casey Affleck, called I'm Still Here. The movie wasn't all that well received, and the whole thing ended up feeling like one big joke that only Joaquin and Casey really ever thought was funny.

How does Casey Affleck, who is typically known for more acclaimed fare and being selective about his roles, become involved in such a bizarre project? Well, he and Joaquin are old friends-- and moreover, they were brothers-in-law at the time.

Casey and youngest Phoenix daughter Summer were married for 11 years, from 2006 to 2017, during which time they had two children together - sons Indiana August and Atticus.

Casey was a Phoenix family in-law longer than anybody had been up to that point, or since.

The Girls Were In A Cult-Spoofing Punk Band

In 1997, a strange band with an even stranger-- but entirely fictional-- backstory was formed called The Causey Way. The gimmick of the new wave/punk band was that they were actually a religious cult whose public face was that of a band, going so far as to have t-shirts that read phrases like "The Causey Way Is Not A Cult." The band was fronted by "Causey" himself-- real name, Scott Stanton-- and consisted of with crazy names like The Truth, The Button, Dr. St. Causey, Boy Causey, Summer Causey, and Rain Causey.

Wait a minut: some of those names sound a bit familiar, don't they? Yes, in actuality, Summer Causey and Rain Causey were just the stage names of Summer and Rain Phoenix, founding of the odd group. The band remained active for four years, touring and releasing four albums without once dropping the charade of their supposed origin story. When the group disbanded in 2001, they announced that leader Causey had been committed, and that The Truth had ed the Church of Scientology.

While a few former Causey Way went on to form another musical group called Pilot Scott Tracy, the Phoenix sisters sat that evolution out. Still. they, along with Liberty, weren't quite down with their musical careers just yet.