Jennifer Lawrence thinks Bradley Cooper "sweats from his butt".

Jennifer Lawrence

Jennifer Lawrence

The 25-year-old actress was astonished by the patches of perspiration her friend and frequent co-star sported when they were rehearsing for dance scenes in 'Silver Linings Playbook'.

She said: "When we were doing our dance lessons together, I'm pretty sure he sweats from his butt first.

"You know, you've got pit stains everywhere but like his butt would start sweating and

I'm like, 'Is your butt sweating before your armpits are sweating?' "

But Jennifer - who can be seen opposite the 40-year-old hunk for the fourth time in new movie 'Joy' - admitted she has never asked her friend about his sweaty rear.

Speaking to Rickie, Melvin and Charlie on the KISS FM Breakfast Show, she said: "We didn't, you know, have long conversations about it. It's just something I kind of like

clocked.

I wanted to keep the sexual chemistry alive. I didn't want to be like, 'Hey, can we talk about your sweaty ass?' "

The Oscar-winning beauty has starred in a host of critically-acclaimed movies but still has a host of dreams she wants to fulfill.

She said: "I'd love to work with Bill Murray. He is just a hero and I met him and he was so cool, he was everything I wanted him to be, so I liked that.

"I'd love to do a Cohen Brothers movie. Can I just make all these things come true or do I just say them out loud.

"Woody Allen's never called me. You don't have to. I mean if you don't like me, you don't do it. I'm just saying you've never called me!"

Listen to the full interview in the New Year. Head to www.kissfmuk.com for more.

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