George Clooney had to propose to his fiancee twice.

The 53-year-old actor is engaged to lawyer Amal Alamuddin but when he popped the question over dinner at his house last month, at first she didn't believe he was serious.

A source said: ''George has been blown away by her passion, her brains, and sheer force of will.

''Frankly, he's been worried that someone else would snap her up if he didn't act, so he produced the ring and. much to his relief, she said yes.

''But he did have to ask her twice! Amal thought he was pranking her at first. Happy isn't a strong enough word to describe them right now.''

George and Amal are currently planning their wedding and it will be a small, private ceremony.

A source told Grazia magazine: ''The important people will be there, but this is private, not for public consumption, so it will be friends and family only.

''It was a long time coming, but when George commits to something he really sees it through. Amal is the one.''