Gwyneth Paltrow's Tears For Kids 6/11/08

Gwyneth Paltrow missed her children so much while filming Hollywood blockbuster Iron Man, she sat in her trailer between scenes and cried her eyes out.

The actress, who is mum to four-year-old Apple and Moses, two, took a three year sabbatical from her hugely successful career after the birth of her daughter in 2004.

But she found returning to work was much harder than she thought, as she was separated from the tots for long periods of time during shooting for the movie in the U.S. She tells Britain's Now magazine, "It was hard some days.

"I'd think: 'Oh my God, back home, my kids will be in the bath right now and I should be there with them.' "Then I'd sit in my trailer and cry."