Mar 24, 2009, 5:00 GMT
Julia Roberts found her sex scenes with Clive Owen "hideous".
The actress - who stars alongside the British actor in new spy thriller 'Duplicity' - admits their raunchy love scenes were uncomfortable to shoot.
She said: "It comes in handy when you know somebody well, because you can just look at each other and say, 'Isn't this incredible uncomfortable?' And then there'll be my son, Henry, on set, just looking from the corner. It's pretty hideous actually!"
Despite being firm friends with Clive, the mother-of-three - who raises four-year-old twins Phinnaeus and Hazel and 20-month-old Henry with her husband Daniel Moder - was anxious about stripping off so soon after giving birth.
She explained to Britain's Closer magazine: "To be honest, I was kind of panicking about it. You have a baby and you just want to stay at home in your elasticated-waist pants."
Julia - who also starred alongside the 44-year-old actor in 2004 drama 'Closer' - recently admitted they laughed their way through the raunchier moments in 'Duplicity'.
She said: "We did laugh the whole time. We've got a very similar sense of humour. The poor director, Tony Gilroy, had to have a lot of patience. The steamier it got the funnier we found it."
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