Hugh Grant, 54, has worked with a fair share of beautiful leading ladies throughout his career — but according to the star, one of the women may "hate" him today.

During last night's new episode of Bravo's 'Watch What Happens: Live,' Hugh revealed his former 'Notting Hill' costar Julia Roberts wasn't a great kisser because of her big mouth.

"I've probably made too many jokes about the size of her mouth. She might hate me by now," the star joked to 'WWHL' host Andy Cohen on Wednesday, Feb. 18.

hugh grant and julia roberts

Hugh and Julia in 'Notting Hill.'

The British actor went on to explain that it was difficult to kiss Julia, 47, during the filming of the 1999 rom-com 'Notting Hill' because of the size of her mouth. Though Hugh admitted he "was aware of a faint echo," as they kissed onscreen, he cheekily added, "She is actually… she was great and very, very beautiful."

Related Story: Julia Roberts' Mother Betty Lou Motes Has Died at Age 80 (REPORT)

During the sit-down, Hugh also dished on his infamous relationship with ex-girlfriend Elizabeth Hurley, 49, whom he dated from 1987 to 2000.

hugh grant and elizabeth hurley

Hugh and Elizabeth in January 2000.

"The funny thing is, it did [work]," the father-of-three said when asked why they split. "It did. She's still my best friend. The sex bit probably fizzled out but now she's my absolute best friend, the number one person I call in a crisis."