Gwyneth Paltrow has been having guitar lessons with her husband.

The actress plays an alcoholic country singer in her forthcoming movie 'Love Don't Let Me Down' and admits she was "embarrassed" when she asked Coldplay frontman Chris Martin - with who she has a five-year-old daughter Apple and four-year-old son Moses - to help her master the instrument.

She said: "He was so helpful, so sweet and encouraging. I mean, it's embarrassing to be playing in front of your husband, especially when he's in one of the world's most successful bands.

"He is so great because he's so supportive of me as an artist. I really lucked out with him. He's deeply lovely and special."

The 37-year-old star gave up exercising and relaxed her strict diet regime when making the movie in Nashville, and admits her figure has suffered as a result of the calorific treats she ate.

She added to America's Harper's Bazaar magazine: "I was so bad with the food and alcohol in Nashville.

"If you saw me naked now compared to what I looked like when I did 'Iron Man 2', when I was exercising every day... I'll get it back together, but I've never eaten so much fried food and white flour in my life, ever."