What happens when two really big celebrities want to guest star on one of TV's hottest shows?

The show turns them down.

Both Jennifer Aniston and Ben Stiller wanted to appear on FOX's 24, but producer Joel Surnow turned them down because they are "too recognizable. They'll take you out of the reality."

The show has added a lot of new cast members this season, including Rick Schroder, Peter MacNichol, Regina King, Eric Balfour, Powers Boothe, and Michael Angarano, so maybe a big name star (or stars) would put the entire feel of the show out of whack.

Deadwood fans take note! Powers Boothe has joined the cast of 24. He'll play the Vice President. D.B. Woodside's character, Wayne Palmer, is now President.

This is just the latest is a series of big casting moves the hit FOX show has made. We've already heard that Eric Balfour, Peter MacNichol, Regina King, and Michael Angarao will be in the cast this season, which starts in January.

[via TV Tattle]

The FOX show just continues to add more and more new characters to the show.

The newest cast member is Michael Angarano. You might remember him as Jack's son on Will and Grace, and the star of the incredibly underrated drama Cover Me several years back, as well as the movies Sky High, Almost Famous, Lords of Dogtown, and Seabiscuit.

The new season of 24 starts in January.