The Cambridge-educated, 34-year-old actress, who's nominated for her performance as a pregnant activist in The Constant Gardener, is engaged to director Darren Aronofsky.
In announcing that she is with child, Weisz said of Aronofsky (whose films include Requiem For a Dream and Pi): "I found myself a sophisticated, educated American. He's not an actor. He's traveled the world. He knows where Europe is, unlike a lot of Americans. He's very cultured, but he's all man."
Speaking recently to PEOPLE about her pregnant Gardener character – and other topics – Weisz said that she was able to look like an expectant mother in her nude scenes thanks to "a prosthetic that was stuck on every morning. It was painted to look like my flesh."
Asked if the look helped her practice for the real thing, she replied, "I can't talk about that," but said of her engagement, "I have a beautiful ring."
Weisz also told PEOPLE about The Fountain, a sci-fi love story directed by Aronofsky with Hugh Jackman due out later this year. "At work we're very different to how we are around the house," she said. "I got to see his professional side. I've got a lot of directors to compare him to, and he's very talented. It's sexy to see someone be good at something."