Catherine Margaret Shepherd (born 1975) is an English actress and writer, with a career spanning radio, theatre, film and television.
Shepherd was born in Hammersmith, London, England. She is the daughter of well-known actor Jack Shepherd, who is perhaps most famous for having played Charles Wycliffe in the HTV television series Wycliffe. She was educated in South London at the James Allen's Girls' School.
A prolific writer, having co-written several plays performed at the Edinburgh Fringe, Shepherd's stage play Cats and Monkeys has been produced as a BBC Radio 4 Afternoon Play, with a cast featuring Anna Carteret, Jack Shepherd and the author.
She was a commissioned writer on the comedy sketch show Party Piece (produced by Objective and shown on E4) and also wrote on the BBC Radio 4 show Concrete Cow. Shepherd co-wrote Your Whole Life, which won a Best of the Sunday Lizard award at the Traverse Theatre.
In 2004, Shepherd appeared in an episode of Channel 4 sitcom Peep Show in the episode University Challenge. She reprised her role in the final season in 2015.
Shepherd speaks fluent Italian, and achieved honours at senior grade in ballet dancing.