Rock matriarch Sharon Osbourne will make her first film appearance in the romantic comedy IT'S A BOY GIRL THING.

The wife of Black Sabbath frontman Ozzy, who shot to fame on the MTV reality show The Osbournes, will star in director Nick Hurran's tale of switched identities which is currently filming in the UK and Canada.

The film is being produced by Rocket Pictures - which is owned by Osbourne's close friends and gay newly weds SIR Elton John and David Furnish.