Gwyneth Paltrow is more proud of 'Country Strong' than any of her previous work.

The 38-year-old actress - who plays an alcoholic country singer trying to resurrect her career in the new movie - normally hates watching herself on screen, but was proud of all the work she had put into her latest film.

She said: "Last night, when I was watching the film, I thought, 'This is the best job I've ever done.'

"Normally I can't stand to see myself but with this film, I felt like it all came together, all that hard work and putting myself in such an uncomfortable position where I felt so scared of how I was going to do it. I'm happy with how it turned out."

Gwyneth - who has children Apple, six, and Moses, four, with husband Chris Martin - also admitted she had to do more preparation for this role than any other she has played in her career.

She added in an interview with InStyle magazine: "I've never prepared for anything more in my life. It was a big responsibility. There was studying with an accent coach, learning to play guitar and, of course, the singing.

"My voice didn't have any power and I wanted to try to sing properly. I was so nervous about performing live scenes in the film, that's so foreign to me.

"Learning to play guitar was so hard! Luckily, my family tolerated me while I was practising. I was pretty bad."