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Matt Damon has branded his love scenes with Angelina Jolie "weird".Damon, who is close friends with Jolie's lover Brad Pitt, has admitted he found it difficult filming the steamy scenes.

He told US TV show 'Good Morning America': "Doing a love scene with the girlfriend of a good friend is weird. We all know each other."

Jolie, 31, revealed Pitt supported their scenes and even wished them luck.

She added to the programme: "In reality both the people we're involved with couldn't have cared less about that because they know us. It's one of those things where it's like the least threatening person. You know, 'Good luck to you guys, I hope it's not too awkward.'

She added: "The difference between kissing Matt and kissing Brad is simple. One's a friend and one's my lover."

While Jolie was happy to kiss her lover's friend, she found it harder to play a character who was her complete opposite in real life.

She said: "I realised early on this was going to be the film where I am the weak victim."

Damon added: "In one scene she had to act so apologetic and just so unlike Angie."

In the film, Damon plays one of the first CIA spies and Jolie portrays his wife who is left crushed by his lies.