How old was David Tenant in Harry Potter?

Answer 1

He changed his name when he was 16, when he joined the actors union Equity after landing his first professional acting job (in 'Dramarama'). However he has never changed his name legally, though he considers Tennant to be his 'real' name and uses it in all areas of his life.

Answer 2

He was born on April 18, 1971, and the Harry Potter and the Goblet of Fire movie came out in late 2005, so he was around 34 at the time. See the Related Link below for his imdb (internet Movie DataBase) entry.

Answer 3

In David Tennant's first series of Doctor Who (in 2006) he was 35