4.Iwan Rheon, Joe Dempsie, and Alfie Allen all auditioned for Jon Snow on Game of Thrones before being cast as Ramsay, Gendry, and Theon, respectively.
5.Paul Wesley (who went on to play Stefan) and Michael Trevino (who went on to play Tyler) both auditioned for Damon on The Vampire Diaries.
6.And Zach Roerig read for Stefan, Damon, and Tyler before being cast as Matt.
7.Alisha Boe originally auditioned for Hannah in 13 Reasons Why before being cast as Jessica.
16.Peter Mullan was originally meant to play Peter Abernathy or the Man in Black in the Westworld pilot. He had a scheduling conflict and was later cast as James Delos, the owner of the park, in Season 2.