Hollywood casting is a strange business, full of near misses and last minute swaps that fans rarely hear about until years later. Sometimes the person almost cast in a role turns out to share a last name, and often a face, with the actor who eventually landed the part. These stories tend to surface in interviews long after the fact, when the actors involved feel comfortable looking back at how close things came to going differently.
What follows are ten real cases where sibling actors either swapped roles outright, were both considered for the same character, or ended up playing versions of one another on screen. Some of these are well documented industry history, while others rely on the actors’ own recollections given years later. Either way, they offer a fun glimpse into how fluid casting decisions can be, even for roles that now feel impossible to imagine anyone else playing.
1. John Cusack and Joan Cusack in The Breakfast Club
Before Molly Ringwald and Judd Nelson became the faces of one of the defining teen films of the 1980s, writer director John Hughes considered a very different pairing. According to Ringwald’s own account, “From my understanding, John Cusack was gonna play Bender and Joan Cusack was going to play Allison.” Both siblings had small supporting roles in Sixteen Candles at the time, which is likely how they landed on Hughes’s radar for his next project.
It is hard to picture The Breakfast Club with anyone other than Nelson’s sneering rebel or Sheedy’s silent basket case, but the Cusacks were seriously in the mix. John went on to build a career on films like Say Anything and High Fidelity, while Joan earned two Best Supporting Actress Oscar nominations for Working Girl and In & Out. Their paths crossed again decades later, but never quite in the way Hughes originally imagined.
2. Jeremy London and Jason London in I’ll Fly Away
Twin brothers Jeremy and Jason London have one of the more literal examples of swapping a role between siblings. Jeremy London played Nathan Bedford for two seasons on I’ll Fly Away, but his twin brother, Jason London, took over the role for the 90-minute series finale. The switch happened almost by accident rather than by design.
The full story is even more layered than a simple recasting. The show was canceled before shooting on the finale began, and Jeremy had already booked Angel Falls. Ironically, Jason was initially cast as Nathan in the original series but let the part go to Jeremy because he was busy filming a movie. In other words, both brothers had a claim to the role at different points, trading it back and forth as their schedules shifted.
3. Liam Hemsworth and Luke Hemsworth in the Thor franchise
Chris Hemsworth is now inseparable from his role as the Norse god of thunder, but the character almost went to a different Hemsworth entirely. Their youngest brother, Liam, was up for the role of Thor originally. After he didn’t make the final cut, Chris’s manager called the casting directors and asked if they’d like him to bring Liam’s older brother back in. That call effectively launched one of the biggest franchises in Marvel history.
The family connection to the role did not stop there. Eldest brother Luke also found his way onto the big screen version of the character, appearing as Chris’s character in Thor: Ragnarok during a self referential cameo sequence. It is a rare case of three brothers all having a direct line to the same superhero part at different moments.
4. Laverne Cox and M. Lamar in Orange Is the New Black
When Orange Is the New Black needed to show a flashback of Sophia Burset before her transition, the production faced an unusual casting puzzle. Laverne Cox solved it herself, since the director of the show, upon finding out that she had a twin brother, M. Lamar, insisted that he come and audition for the role. That’s how he got to star as his sister’s character. The casting director’s insistence turned out to be the right call.
M. Lamar, a composer and performer in his own right, effectively played an earlier version of the character his sister had already made famous. It is one of the more unusual examples on this list, since the same character was quite literally split between siblings across different points in the character’s timeline, rather than being a hypothetical swap that never happened.
5. Dakota Fanning and Elle Fanning in I Am Sam
Long before either Fanning sister became a household name, the two shared a single character across different ages. Dakota Fanning played Lucy Diamond Dawson in I Am Sam, and her younger sister, Elle Fanning, played the 2-year-old version of Lucy. The film needed a toddler to represent the character’s earliest years, and casting a real sister solved the resemblance problem instantly.
This early collaboration set a pattern that continued in other projects, with Elle getting her start playing the younger version of Dakota’s characters in both I Am Sam and Taken. The arrangement worked so well that directors kept returning to it, effectively giving Elle a foothold in the industry through roles that were technically her older sister’s first.
6. Penélope Cruz and Mónica Cruz in Pirates of the Caribbean: On Stranger Tides
Penélope Cruz was pregnant while filming the fourth Pirates of the Caribbean installment, which created a problem for the film’s more physical scenes. The solution came from within the family, since Penélope Cruz was pregnant while shooting the fourth installment of the Pirates of the Caribbean franchise, and in order to not recast her, the director came up with a brilliant idea, Mónica Cruz, her little sister, was invited as a body double for the fighting scenes.
The resemblance between the two sisters made the swap nearly invisible on screen. As one account put it, the sisters look so much alike that viewers probably wouldn’t be able to notice the difference without knowing this fact beforehand. It stands as one of the smoothest sibling substitutions in recent blockbuster history.
7. Mary-Kate Olsen and Ashley Olsen in Full House
Few sibling casting stories are as well known as the Olsen twins sharing the role of Michelle Tanner on Full House. Twin sisters Mary-Kate and Ashley Olsen both played Michelle Tanner on Full House from 1987 to 1995. What makes this case unusual is that the sharing was not hidden or occasional but built into the show’s production for its entire run.
The two even appeared in scenes together as different characters entirely. Both actors appeared together onscreen in several episodes, and aside from Michelle, they played Melina, the Tanners’ cousin from Greece, as well as Good Michelle and Bad Michelle, physical manifestations of her conscience. It is a rare instance where two siblings essentially split a starring role for nearly a decade rather than one simply understudying the other.
8. Rami Malek and Sami Malek in Buster’s Mal Heart
Rami Malek’s rise to fame through Mr. Robot and Bohemian Rhapsody often overshadows the fact that he has an identical twin who also works in the industry. The resemblance is close enough that Rami even joked that they looked so much alike that their parents probably lost track of who’s who. That similarity has occasionally translated into actual screen work.
In the independent film Buster’s Mal Heart, the brothers put that likeness to practical use. Sami even served as Rami’s body double in the beginning of the movie, standing in for a role that audiences assumed was played entirely by his more famous twin. It is a small but telling example of how closely their careers have brushed against one another.
9. Alfie Allen and Lily Allen and the Game of Thrones role that almost was
Not every story on this list ended with a sibling actually stepping into the role. Alfie Allen played Theon Greyjoy on Game of Thrones, and there was a widely reported claim that his sister, singer Lily Allen, was offered the role of Theon’s sister Yara. The singer had claimed that producers of the HBO show had offered her the role of Alfie’s character Theon’s soldier sister Yara, but Lily turned down the role due to an uncomfortable first scene between the two.
Alfie later disputed the claim entirely, stating firmly that the part was never seriously in his sister’s hands. Alfie dismissed the comments, declaring that actress Gemma Whalen was always the first choice, saying, “The only thing I’m going to say on this is that’s not true.” The conflicting accounts leave this one as one of the more disputed entries in sibling casting lore, a reminder that not every story gets confirmed by both sides.
10. Khadijah and Malika Haqq in Sky High
Some roles are written for a character who can duplicate themselves, and in those rare cases, casting actual twins solves the visual effects problem before it even starts. That was the situation with Penny in the 2005 Disney film Sky High, a character played by twin sisters Khadijah and Malika Haqq. The role of Penny, who had the ability to create duplicates of herself, was portrayed by twin sisters Khadijah and Malika Haqq, and despite not initially seeking out twins for the role, the director made a wise decision in casting the sisters.
The audition room told its own story about how competitive the search for the right look had become. The Haqq twins recall their audition, where they noticed other single actors waiting, but felt lucky to have been selected for the part. Their real life resemblance turned what could have been a difficult effects sequence into something the production could shoot with two live actors standing side by side.
Looking across these ten stories, a pattern starts to emerge. Casting directors and directors often lean on sibling resemblance as a practical solution, whether that means solving a pregnancy scheduling conflict, filling in for a character’s younger years, or simply recognizing that a well known actor’s brother or sister might be the better fit for a specific part. Some of these near misses became industry legend precisely because the alternate version never happened, leaving fans to wonder how differently a film or show might have turned out.
