Simon Pegg bonded with Rosamund Pike after one of her "chicken fillets" kept "sticking to him" during a love scene.
The actors star together in Hector and the Search for Happiness and had to record while almost naked.
The problems they experienced left Simon happy to open up to her about anything.
"We had to do quite a graphic love scene,” he told the latest edition of British Glamour magazine. “You wear these modesty things that cover your bits and for women you'll wear ones on the ends of your boobs so you don't look naked.
They were like chicken fillets and one kept sticking to me.”
The motion picture, which also stars Toni Collette, tells the tale of a psychiatrist who searches the globe to find the secret of contentment.
It is released in cinemas next year.
“Once you've done that with someone, you can really talk about anything," Simon giggled.
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