At the
1998 Laurence Olivier Awards, Dreyfus won the
Laurence Olivier Award for Best Supporting Performance in a Musical for his work in
Lady in the Dark at the
National Theatre. In the same year, Dreyfus won Second Prize at the
Ian Charleson Awards for his 1997 performance as
Caius Cassius in
William Shakespeare's
Julius Caesar at the
Birmingham Rep. Dreyfus's first television break came with the
BBC comedy series
Absolutely Fabulous. followed by roles as Constable Kevin Goody in
Ben Elton's sitcom
The Thin Blue Line and
Tom Farrell, the gay flatmate of Linda la Hughes (
Kathy Burke) in
Gimme Gimme Gimme. Dreyfus played opposite
Bette Midler in the short-lived American sitcom
Bette. Known for portraying "camp, endearing characters," Dreyfus (in a
Sheengate Publishing interview) compared the character Frank Spencer from ''
Some Mothers Do 'Ave 'Em'', whom he described as a campy but married heterosexual, to Dreyfus's character Kevin Goody from
The Thin Blue Line. Regarding his character Tom Farrell from
Gimme Gimme Gimme, Dreyfus hypothesized that, even if the character were heterosexual, the actor would still portray Tom as camp and flamboyant. He played Thermoman in the
BBC One comedy
My Hero, a role he took over in the sixth series from
Ardal O'Hanlon. Although the same character, he used the name George Monday, as opposed to O'Hanlon's character's name, George Sunday. After disappointing ratings, the show was cancelled. Dreyfus also starred as
Mr Teasy-Weasy in the 2004 comedy film
Churchill: The Hollywood Years. From 2012 to 2017, Dreyfus appeared as the Reverend Roger Jones in the
Sky Living series
Mount Pleasant. In 2017, he voiced an incarnation of
The Master from
Doctor Who in the
Big Finish Productions release
The First Doctor Adventures Volume One, going on to appear as the character in 2019's "The Home Guard", 2020's "The Psychic Circus" and 2022's "Blood of the Time Lords". In an interview on SpectatorTV, Dreyfus said he was dismissed from the role following comments he made on Twitter in support of author
J. K. Rowling. ==Personal life==