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    I'm Still Thinking About These 13 TV Siblings Who Were Just Replaced As If Nothing Was Different

    Noah Centineo suddenly replacing Jake T. Austin was the biggest plot twist on The Fosters.

    1. Ruby Stokes played Francesca, the sixth Bridgerton child, on Bridgerton for the first two seasons.

    Closeup of Ruby Stokes

    Here she is in Season 2:

    Ruby Stokes in "Bridgerton"

    It was recently announced that Hannah Dodd would be taking over the role for Season 3.

    Closeup of Hannah Dodd

    2. Jake T. Austin played Jesus on The Fosters for the first two seasons.

    Closeup of Jake T. Austin

    Noah Centineo took over the role from Season 3 onwards. He also reprised his character in the spinoff, Good Trouble.

    Closeup of Noah Centineo

    Here they are in their roles side-by-side:

    Side-by-side of Jake T. Austin and Noah Centineo playing Jesus in "The Fosters"

    3. Callum Wharry played Tommen, Joffrey and Myrcella's younger brother, in Seasons 1 and 2 of Game of Thrones.

    Closeup of Tommen in "Game of Thrones"

    Dean-Charles Chapman took over the role for Seasons 4 through 6.

    Closeup of Dean-Charles Chapman

    Here they are in their roles side-by-side:

    Side-by-side of Callum Wharry and Dean-Charles Chapman playing Tommen in "Game of Thrones"

    4. Parker Bagley played Jason, Alison's older brother, for the first season of Pretty Little Liars.

    Closeup of Parker Bagley

    Drew Van Acker took over the role from Seasons 2 to 7.

    Closeup of Drew Van Acker

    Here they are in their roles side-by-side:

    Side-by-side of Parker Bagley and Drew Van Acker as Jason in "Pretty Little Liars"

    5. Valerie Jones played Judy, the youngest Winslow daughter, in the pilot of Family Matters.

    Closeup of Valerie Jones

    Jaimee Foxworth took over the role after the pilot and played Judy up until Season 4, when her character strangely disappeared without any explanation.

    Closeup of Jaimee Foxworth

    Here they are in their roles side-by-side:

    Side-by-side of Valerie Jones and Jaimee Foxworth as Judy in "Family Matters"

    6. Bradley Stryker played Trey, Ryan's older brother, in Season 1 of The O.C.

    Closeup of Bradley Stryker

    Logan Marshall-Green took over the role from Season 2 onward.

    Closeup of Logan Marshall-Green

    Here they are in their roles side-by-side:

    Side-by-side of Bradley Stryker and Logan Marshall-Green as Trey in "The O.C."

    7. Also on The O.C., Shailene Woodley originally played Kaitlin, Marissa's little sister, in Season 1.

    Closeup of Shailene Woodley

    The character was absent in Season 2, and Willa Holland took over the role from Season 3 on.

    Closeup of Willa Holland

    In an interview with ET Canada, Woodley explained why she was recast: "I was 11, and I was on as a guest, recurring character, or whatever. My character went to boarding school, and when they decided to bring her back, they actually re-auditioned me to bring her back. But I didn’t go through puberty until late: I was the 15-year-old who had no boobs. So, at 11, I was like a little mouse-child. I looked like an 8-year-old. So, there was no weirdness when Willa Holland got it because she was so obviously right for the role…and I was so obviously not."

    Here they are in their roles side-by-side:

    Side-by-side of Shailene Woodley and Willa Holland as Kaitlin in "The O.C."

    8. Ric Carrott played Chuck, the oldest Cunningham son, in the pilot of Happy Days.

    Closeup of Ric Carrott

    Gavan O'Herlihy took over the role for the remainder of Season 1.

    Closeup of Gavan O'Herlihy

    The part was then recast a third time, with Randolph Roberts taking over for just two episodes in Season 2.

    Randolph Roberts holding a basketball

    Chuck's character disappeared entirely after Season 2. No explanation was ever given as to where he went, and all of the characters acted as if he'd never existed. The example is so infamous that it coined the term "Chuck Cunningham Syndrome."

    Chuck Cunningham

    Here are the three Chucks in their roles side-by-side:

    Side-by-side of Ric Carrott, Gavan O'Herlihy, and Randolph Roberts as Chuck in "Happy Days."

    9. Lily Nicksay played Morgan, Cory and Eric's little sister, for the first two seasons of Boy Meets World.

    Closeup of Lily Nicksay

    Lindsay Ridgeway took over the character from Season 3 onward.

    Closeup of Lindsay Ridgeway

    Here they are in their roles side-by-side:

    Lily Nicksay and Lindsay Ridgeway as Morgan in "Boy Meets World"

    10. Also on Boy Meets World, Daniel Jacobs (son of the show's executive producer, Michael Jacobs) played Josh, the baby of the Matthews family.

    Closeup of Daniel Jacobs

    In Girl Meets World, however, Uriah Shelton took over the role.

    Closeup of Uriah Shelton

    Here they are in their roles side-by-side:

    Daniel Jacobs and Uriah Shelton as Josh in "Boy Meets World" and "Girl Meets World"

    11. Jazz Raycole played Claire, the middle Kyle child, for the first season of My Wife and Kids.

    Closeup of Jazz Raycole

    Jennifer Freeman took over the role from Season 2 onward.

    Closeup of Jennifer Freeman

    Here they are in their roles side-by-side:

    Side-by-side of Jazz Raycole and Jennifer Freeman as Claire in "My Wife and Kids."

    12. Lecy Goranson played Becky on Roseanne from Seasons 1 through 5.

    Becky in "Roseanne"

    When Goranson left Roseanne to attend college, Sarah Chalke took over the role from Seasons 6 through 9.

    Closeup of Sarah Chalke

    However, Goranson then came back and occasionally played the character during Season 8 whenever Chalke wasn't available. Chalke then resumed the role full time again in Season 10. The writers eventually turned the confusing casting sitch into a running gag on the show. Goranson reprised her role as Becky on the reboot, The Conners. Chalke also appeared on the reboot as another character, Andrea, to add to the joke.

    Becky and Andrea in "The Connors."

    Here they are in their roles side-by-side:

    Side-by-side of Lecy Goranson and Sarah Chalke as Becky in "Roseanne"

    13. And finally, Lisa Robin Kelly played Laurie, Eric's older sister, on That '70s Show in Seasons 1-3, and Season 5.

    Closeup of Lisa Robin Kelly

    Christina Moore took over the role for Season 6.

    Closeup of Christina Moore

    Here they are in their roles side-by-side:

    Lisa Robin Kelly and Christina Moore as Laurie in "That '70s Show"