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How all the 'Young Sheldon' characters looked on 'Big Bang Theory': See photos

Portrait of Bryan Alexander Bryan Alexander
May 9, 2024Updated Feb. 25, 2025, 11:09 a.m. ET
"Young Sheldon" ended after seven seasons in May 2024. Here are the main characters and their "Big Bang Theory" counterparts.
"Young Sheldon" ended after seven seasons in May 2024. Here are the main characters and their "Big Bang Theory" counterparts.
CBS
Jim Parsons won four Emmys playing Sheldon Cooper on CBS' "Big Bang Theory" for 12 seasons, from 2007-19. Prequel "Young Sheldon" explores the Nobel Prize-winning Cooper's East Texas childhood.
Jim Parsons won four Emmys playing Sheldon Cooper on CBS' "Big Bang Theory" for 12 seasons, from 2007-19. Prequel "Young Sheldon" explores the Nobel Prize-winning Cooper's East Texas childhood.
Robert Deutsch, USA TODAY
Jim Parsons as Sheldon Cooper on "Big Bang Theory."
Jim Parsons as Sheldon Cooper on "Big Bang Theory."
Michael Yarish, CBS
Jim Parsons, an executive producer and the narrator of "Young Sheldon," brought his robe to return as Sheldon Cooper in the May 2024 "Young Sheldon" series finale.
Jim Parsons, an executive producer and the narrator of "Young Sheldon," brought his robe to return as Sheldon Cooper in the May 2024 "Young Sheldon" series finale.
Bill Inoshita /Warner Bros.
When "Young Sheldon" started, Iain Armitage, who plays Sheldon Cooper, was 9 years old — the same age as his onscreen character.
When "Young Sheldon" started, Iain Armitage, who plays Sheldon Cooper, was 9 years old — the same age as his onscreen character.
Robert Hanashiro, USA TODAY
Armitage at 15, in the final Season 7 of "Young Sheldon."
Armitage at 15, in the final Season 7 of "Young Sheldon."
Pamela Littky, CBS
Amy Farrah Fowler (Mayim Bialik) and Sheldon Cooper (Jim Parsons) got married in the Season 11 finale of "Big Bang Theory."
Amy Farrah Fowler (Mayim Bialik) and Sheldon Cooper (Jim Parsons) got married in the Season 11 finale of "Big Bang Theory."
Michael Yarish, CBS
Sheldon Cooper (Jim Parsons) and Amy Farrah Fowler (Mayim Bialik) in Season 12 of "Big Bang Theory."
Sheldon Cooper (Jim Parsons) and Amy Farrah Fowler (Mayim Bialik) in Season 12 of "Big Bang Theory."
Michael Yarish, WARNER BROS.
Jim Parsons and Mayim Bialik reprised their roles as Sheldon Cooper and wife Amy Farrah Fowler in the series finale of "Young Sheldon." The couple have two children, including a boy named Leonard.
Jim Parsons and Mayim Bialik reprised their roles as Sheldon Cooper and wife Amy Farrah Fowler in the series finale of "Young Sheldon." The couple have two children, including a boy named Leonard.
Bill Inoshita / 2024 Warner Bros. Entertainment Inc.
Laurie Metcalf had a recurring role as Sheldon's mother Mary Cooper in "Big Bang Theory."
Laurie Metcalf had a recurring role as Sheldon's mother Mary Cooper in "Big Bang Theory."
Marc Royce/USA TODAY
Laurie Metcalf as Sheldon's mother Mary Cooper in "Big Bang Theory." The original series is now streaming on Max.
Laurie Metcalf as Sheldon's mother Mary Cooper in "Big Bang Theory." The original series is now streaming on Max.
Michael Yarish, WARNER BROS.
Sheldon Cooper (Jim Parsons) with his mother Mary Cooper (Laurie Metcalf) on "The Big Bang Theory."
Sheldon Cooper (Jim Parsons) with his mother Mary Cooper (Laurie Metcalf) on "The Big Bang Theory."
CBS
Zoe Perry, who is Laurie Metcalf's real-life daughter, played Sheldon Cooper's mother Mary in "Young Sheldon."
Zoe Perry, who is Laurie Metcalf's real-life daughter, played Sheldon Cooper's mother Mary in "Young Sheldon."
Pamela Littky, CBS
June Squibb played Constance "Connie" Tucker, better known as "Meemaw," the mother of Mary Cooper and the maternal grandmother of Sheldon Cooper on "Big Bang Theory."
June Squibb played Constance "Connie" Tucker, better known as "Meemaw," the mother of Mary Cooper and the maternal grandmother of Sheldon Cooper on "Big Bang Theory."
Dimitrios Kambouris, Getty Images
Annie Potts portrayed Meemaw on "Young Sheldon."
Annie Potts portrayed Meemaw on "Young Sheldon."
CBS
Jerry O'Connell played Georgie in "Big Bang Theory." Sheldon had to repair the estranged relationship before his mother Mary would attend his wedding.
Jerry O'Connell played Georgie in "Big Bang Theory." Sheldon had to repair the estranged relationship before his mother Mary would attend his wedding.
Michael Yarish, WARNER BROS.
Montana Jordan starred as George Jr. (Georgie) in "Young Sheldon." Jordan now stars in with his screen wife (Emily Osment) in "Georgie & Mandy's First Marriage."
Montana Jordan starred as George Jr. (Georgie) in "Young Sheldon." Jordan now stars in with his screen wife (Emily Osment) in "Georgie & Mandy's First Marriage."
Pamela Littky, CBS
Courtney Henggeler played Sheldon's sister Missy on "Big Bang Theory."
Courtney Henggeler played Sheldon's sister Missy on "Big Bang Theory."
Michael Yarish, CBS
George Jr. (Jerry O'Connell) and Missy (Courtney Henggeler) just before Sheldon's wedding on "Big Bang Theory."
George Jr. (Jerry O'Connell) and Missy (Courtney Henggeler) just before Sheldon's wedding on "Big Bang Theory."
Michael Yarish, CBS
Raegan Revord stars as young Missy in "Young Sheldon."
Raegan Revord stars as young Missy in "Young Sheldon."
Pamela Littky, CBS
Sheldon's father, George Sr., never appeared in "Big Bang Theory," though Sheldon joked darkly about his deceased flawed father. Lance Barber played the character on "Young Sheldon" and on "Georgie & Mandy's First Marriage."
Sheldon's father, George Sr., never appeared in "Big Bang Theory," though Sheldon joked darkly about his deceased flawed father. Lance Barber played the character on "Young Sheldon" and on "Georgie & Mandy's First Marriage."
Pamela Littky, CBS
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