Grant mocks Roberts' 'big mouth'

British actor Hugh Grant prompted Oprah Winfrey to jump to her pal Julia Roberts' defence on Friday, after he mocked the Oscar- winning actress' "big mouth".

Grant appeared on Winfrey's chat show to promote his upcoming movie Bridget Jones: The Edge of Reason alongside Renee Zellweger and Colin Firth, when he was asked to share his thoughts on his Notting Hill co-star, Roberts.

He quipped: "Very big-mouthed! Literally, physically, she has a very big mouth. It is a very big mouth. When I was kissing her I was aware of a faint echo."

As Winfrey stifled her laughter, she said: "She's one of the nicest people I ever met."

Grant jokingly hit back: "I wouldn't go that far…"

He also poked fun at his other leading ladies, branding Emma Thompson a real-life man and declaring that Julianne Moore hates him.