Matt Smith first appeared at the end of David Tennant’s (The Tenth Doctor) final episode, “The End of Time: Part Two,” which aired on January 1st of 2010. Smith’s first full episode, “The Eleventh Hour,” then aired a few months later.
Earlier this year the brilliant actor announced that he would no longer be playing The Doctor come 2014. The Eleventh Doctor will leave his cool bow ties behind in this year’s Christmas special. Before that, though, Smith and Tennant—alongside Jenna Louise-Coleman, Billie Piper, and John Hurt—star in the show’s 50th Anniversary special, which will air November 23rd!
Celebrate Matt Smith’s birthday by watching an episode of “Doctor Who.” Before that, though, be sure to check out the slideshow on the top left, which is composed of 20 photos of the wonderful actor! Also, check out this list of some of The Eleventh Doctor’s best quotes!