Gwen starred alongside Jerry Hall in a national theatre tour of Picasso's Women.
Gwen was nominated for the 1990 BAFTA for Best Actress for her role in A Bit of a Do.
Gwen is married to the writer Graham Reid.
Gwen trained at East 15 Acting School, London.
On The Rutles DVD commentary, Eric Idle described her as "the best comedy actress I ever worked with. She could do anything."