Geoffrey McGivern (born 1952) is an English actor in film, radio, stage and television. He was born in Balham, South London and grew up in York. There he attended Archbishop Holgate's School, where he was made Head Boy. He studied at Christ's College, Cambridge, where he was involved in the renowned Footlights society and the Marlowe Society.
He played Ford Prefect in the radio series (1978–80) and subsequent LP releases of The Hitchhiker's Guide to the Galaxy by Douglas Adams, whose role he reprised for the three new series broadcast on BBC Radio 4 between 2004 and 2005. A more recent radio appearance was in The Ape That Got Lucky and has appeared in TV shows such as Press Gang, Chef!, Big Train, Blackadder the Third: Dish and Dishonesty, Chelmsford 123, Jonathan Creek, 15 Storeys High, Armstrong and Miller. and series three of Peep Show.
For the 1998 radio SciFi drama Paradise Lost in Cyberspace (Colin Swash, BBC) McGivern teamed up with old Hitchhiker's colleague Stephen Moore and Lorelei King (member of cast in the 2005 Hitchhiker's radio show sequel). He later played the Supreme Ruler in BBC2's Sci-Fi comedy Hyperdrive (2006–). In 2007 he appeared in the BBC Radio 4 comedy Peacefully in their Sleeps and in 2008 he appeared as Professor John Mycroft in the BBC2 science sitcom Lab Rats. He also appeared in episode 5 of season 3 of the TV series "A Bit of Fry and Laurie."
In 2009 he played the role of Barry in Trebor Mint adverts.