had crowds buzzing at the London premiere of the animated Bee Movie
, where she chatted about her fitness regime.
"I have a lifestyle," she told reporters Thursday night. "It involves keeping my sanity by going to the gym."
Zellweger, 38, cut a slim figure on the red carpet, but said she doesn't miss her Bridget Jones look. "I don't think my curves are absent," she said with a laugh. "I think I'm doing alright, thank you very much."
The Oscar-winning actress also talked about shooting the upcoming movie Leatherheads
, which costars George Clooney
In fact, she was full of praise for her longtime pal
, who also wrote and directed the film. "He'd run the length of the field all day long with the 20-year-olds, then put on his director hat and he'd go edit," she said. "It was non-stop. He loved this movie."