Credit: Fame Pictures


After sharing a romantic lunch with Muse rocker Matthew Bellamy in L.A. Monday, a super-pregnant Kate Hudson lifted up her sweater to reveal her growing baby bump. See more photos of Kate's exposed belly.

The 31-year-old Something Borrowed actress hasn't been shy about flaunting her pregnancy curves. During the Grammy Awards on February 13, Hudson rocked a sexy cut-out Roberto Cavalli dress while cheering on Bellamy, 32, from the audience.

Still, a source tells the new issue of Us Weekly (on stands now) that Hudson's pregnancy has been anything but easy.

"She was incredibly nauseous the first four months and told me she only gained a pound," the insider told Us. "Pregnancy has been tough."

This will be the second child for Hudson, who welcomed son Ryder, 7, with ex husband, Black Crowes singer Chris Robinson, in January 2004.