18 Times Actors Walked Away From Television Roles After Shooting The Pilot Episode Or Appearing In The First Season Of The Series

It's hard to envision the lead characters of your favorite TV shows being played by anyone other than their well-known series regulars.

CBC / Via giphy.com

But in some cases, a performer may not stick with a role they were originally hired to play, and casting adjustments need to be made.

HBO / Via giphy.com

Here are 18 times entertainers withdrew from a TV series, either after filming a pilot episode or shooting just one season.

1.Ruby Rose moved on from Batwoman after experiencing awful working conditions, they explained in a series of Instagram stories.

Ruby Rose as Batwoman poses in the Season 1 episode, "'How Queer Everything Is Today!"

2.Regé-Jean Page knew from the beginning his Bridgerton role wouldn't be long-term.

Regé-Jean Page as Simon speaks to Queen Charlotte about his foundation of friendship with Daphne

3.Alex Borstein's Mad TV role meant she couldn't play Sookie St. James past the Gilmore Girls pilot.

Alex Borstein stands in a kitchen as she plays Sookie St. James in the original "Gilmore Girls" pilot

4.Farrah Fawcett walked away from Charlie's Angels after its first season to make films with Lee Majors, her then-husband.

Farrah Fawcett as Jill answers the phone in the "Charlie's Angels" pilot episode

5.Ross Butler departed Riverdale when he had to choose between this role and13 Reasons Why.

Ross Butler as Reggie laughs in the school hallway

6.Maura Tierney removed herself from Parenthood due to medical reasons.

Maura Tierney as Sarah talks to her kids in the unaired "Parenthood" pilot

7.David Caruso opted out of NYPD Blue's second season in order to focus on movie projects.

David Caruso as Detective John Kelly meets with Lieutenant Arthur Fancy

8.Jane Levy left Shameless when she won a lead part in Suburgatory.

Jane Levy as Mandy talks to Ian at his place of work

9.Brian Dunkleman didn't continue hosting American Idol after Season 1 to pursue acting.

Ryan Seacrest and Brian Dunkleman speak onstage during the "American Idol in Vegas" concert on September 18, 2002

10.The Mighty Ducks: Game Changers prevented Lauren Graham from staying on Zoey's Extraordinary Playlist.

Lauren Graham as Joan speaks in front of a group in "Zoey's Extraordinary Playlist"

11.Damon Wayans Jr. disappeared from New Girl, returned, and then exited once more.

Damon Wayans Jr. as Coach talks to Jess about shopping in the "New Girl" pilot

12.Xochitl Gomez had to say goodbye to The Baby-Sitters Club when she scored a major Marvel role.

Xochitl Gomez as Dawn invites Kristy over to her house in "The Baby-Sitters Club"

13.Gavin Leatherwood won't be returning toThe Sex Lives of College Girls and will instead explore other opportunities.

Gavin Leatherwood as Nico tutors Kimberly in "The Sex Lives of College Girls"

14.Sherilyn Fenn couldn't remember why she left after the first pilot episode of Birds of Prey was shot.

Sherilyn Fenn arrives at the 1999 Premiere Women in Hollywood Luncheon

15.Aml Ameen left Sense8 over "creative differences."

Aml Ameen as Capheus sits in a bus and comforts Riley in "Sense8"

16.Jennifer Ehle's reason for not continuing to play Catelyn Stark after the original Game of Thrones pilot was "entirely personal."

Jennifer Ehle arrives at the 2019 premiere of "The Wolf Hour" at the Sundance Film Festival

17.The original Phoebe in Charmed, Lori Rom, quit after the pilot was shot due to "personal reasons."

Lori Rom as Phoebe clashes with Prue in the unaired "Charmed" pilot

18.And, lastly, Jeffrey Hunter said no to filming a second Star Trek pilot.

Jeffrey Hunter plays Captain Christopher Pike in the original pilot of "Star Trek"