According to Digital Spy, Eccleston met with Steven Moffat to discuss the "Doctor Who" 50th anniversary plans, but ultimately declined to be a part of the special. "After careful thought, Chris decided not to be in the episode," Digital Spy quotes a source as saying. "He wishes the team all the best."
While the "Doctor Who" 50th anniversary special won't feature Eccleston, it will feature former stars Billie Piper and David Tennant along with Jemma Redgrave, John Hurt and Joanna Page.
For some classic Eccleston moments, check out the video below.
"Doctor Who" airs Saturdays at 8 p.m. ET on BBC America.