CHRIS ROCK struggles to tone down his explicit comedy act when he stars in movies - and wishes Hollywood would return to making R-rated films.

The controversial comedian considers his use of expletive-laden language out of place in today's movie industry, which is becoming he believes is becoming increasingly family-orientated.

Rock, 40, says, "It's sad I became famous at the time they stopped making R-rated movies.

"If ever there was a guy made for R-rated film, it's me.

"You're only allowed one 'f**k' in a PG-13. But I'll survive."