Julian Wadham (born 7 August 1958) is an English actor of stage, film and television.
He has appeared on television as both Charles II (in the 2004 BBC docudrama Wren: The Man Who Built Britain) and George V (in the TV adaptation of the play My Boy Jack). He appeared onstage as Don Pedro (alongside Zoë Wanamaker and Simon Russell Beale) at the Royal National Theatre's 2007-08 production of Much Ado About Nothing.
Currently, he is re-creating the role of John Steed in Big Finish's new audio series The Avengers - The Lost Episodes.
Wadham attended Ampleforth College at the same time as fellow actor Rupert Everett.
Wadham married in 1990; he and his wife, Shirley, have four sons.