Arden and Frost came to prominence in the late 1970s alternative comedy boom, and became recognisable to a national audience with regular spots on Saturday Live. In the early 1980s they were instrumental in the forming of long-running North London comedy show News Revue and shortly afterwards began appearing as a pairing in episodes of series such as The Black Adder and The Young Ones. They are perhaps most remembered for a long-running and award-winning series of commercials for Carling Black Label lager, one of which involved Arden and Frost stripping entirely naked.
He appeared in the 1992 film Carry On Columbus.
He continues to perform with Frost in comedy clubs, although did not follow his partner into the genre of improvisation.
As well as appearing in all the above listed projects Mark also has a successful theatre career, appearing in acclaimed play The Long, The Short and The Tall. He also played the title role in An Inspector Calls at the Garrick Theatre as well as playing the role of Pop in Queen and Ben Elton's musical, We Will Rock You at London's Dominion Theatre.