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.
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.
Harry potter is exactly 21 years old in 2008.
Harry Potter is 16 at the start of the film, then he celebrates his birthday and turn seventeen...
34 years old
Harry Potter was fifteen months old when he moved in with his Aunt and Uncle Dursley.
Daniel Radcliffe was 11 years old when he won the role of Harry Potter
Harry potter is exactly 21 years old in 2008.
As old as the acter of harry potter
It is unclear how old Ron "the truth" is as this information is not widely known or publicly available.
David Tennant was born in 1971 and he is 38 years old (as of 2009).
Harry Potter is 16 at the start of the film, then he celebrates his birthday and turn seventeen...
22 what? In October 2011, Harry Potter is 31 years old.
34 years old
no
The character Harry Potter is 16 in Harry Potter and the Half-Blood Prince.
Harry Potter was born in 1980, this means he would have been 30 years old in 2010.
Harry Potter was fifteen months old when he moved in with his Aunt and Uncle Dursley.
Daniel Radcliffe was 11 years old when he won the role of Harry Potter