George Clooney is engaged to Amal Alamuddin.

The happy couple - who are yet to confirm their relationship but are believed to have been dating for just over a year - are now planning to tie the knot an insider has confirmed.

A source told People magazine: ''George and Amal are trying to keep things very low-key but they also aren't really trying to hide this, it doesn't seem.

''I think it's like they want the people they love to know that this is real, that they plan on being together forever.''

Although the pair are yet to announce their engagement, rumours began circulating that George, 52, had popped the question to the 36-year-old lawyer after she stepped out with a diamond on her ring finger last week.

Amal was even spotted showing off the sparkler during a meal with her fiancé, model Cindy Crawford and actor Edward Norton at sushi restaurant Nobu in Malibu on Thursday (24.04.14).

The pair - who were linked after they enjoyed a dinner date together last October - were also spotted cuddling up at a special screening of George's movie 'Monuments Men' at the White House in February.

An onlooker said at the time: ''His arm was around her shoulder and she had hers around his. They just seemed very, very together.''

The hunky actor got together with Amal shortly after his break-up with Stacy Keibler. The model is said to have ended their relationship over George's refusal to settle down and have kids.