Renee Zellweger always chooses gowns by the same designer for red carpet events.

The Oscar-winning actress admits that when it comes to big events, she always goes to Carolina Herrera, as she trusts the "classic" tailoring of the Venezuelan-born fashion designer.

She explained: "It's classic. It's beautifully tailored. No surprises."

However, the 41-year-old star revealed she doesn't select pieces by Carolina Herrera only for their aesthetic charm, but because she would feel too guilty if she had a whole host of designers creating pieces she would never end up wearing.

Renee added to Britain's Harper's Bazaar magazine: "I can't have 90 people making things for me that I might not wear. To have so many people expend so much effort potentially for nothing - I wouldn't sleep at night."

The slim star - who in the past has been known to stick to a strict macrobiotic diet of fish and vegetables - has reportedly put on 10lbs in recent months after boyfriend Bradley Cooper told her he likes Women with "a little more meat on their bones".

An insider recently revealed: "She banned dairy a long time ago but Bradley loves ice cream and cheese and Renee's started to join in. Potatoes are back on the menu, too.

"Bradley's convinced her to loosen up and she's loving it. Bradley's been very vocal in telling her he's more attracted to women with a little meat on their bones and Renee's doing her best to oblige him."