Christian Coulson is an English actor perhaps most famous for his film portrayal as Tom Marvolo Riddle, the teenage Lord Voldemort , in Harry Potter and the Chamber of Secrets, the second installment of the Harry Potter film franchise.

Coulson attended Westminster School in London on an academic scholarship, and was a member of the UK's National Youth Music Theatre from 1990-1997. He went on to the University of Cambridge, where he received a degree in English from Clare College in 2000.

While at university, he played the Emcee in Cabaret, Arturo Ui in The Resistible Rise of Arturo Ui and Claire in The Maids.

During his professional career, Coulson has earned excellent reviews for his stage performances as well as appearing in film and television. Coulson is openly gay.