Shooting sex scene with Ben Affleck was really awkward, says Blake Lively

Blake Lively has admitted that filming sex scenes with Ben Affleck on the first day of the shoot of 'The Town' was 'awkward'.

In the September issue of Interview, Affleck, 38, tells Lively, 22, he was impressed she was "very poised and comfortable about it - more mature than some of the crew members," reports Usmagazine.com.

Lively said: "Well, I have a big family and no one ever treated me like a child."

"They always treated me like an adult, like an equal. But with acting, I think half of it is just acting confident. We stand on these red carpets and pose in these dresses, but we're all only so confident. It doesn't mean we think we're great looking or anything. It's all a facade. But the sex scene was really awkward. It was my first day, so thank you for that."

"I guess it was good to break the ice," she added.