WireImage 1 / 4

Her bump will go on! Kate Winslet has been fairly low-key since quietly confirming her third pregnancy (her first with third husband Ned Rocknroll) in early June, but on Sunday, Sept. 8, the "Labor Day" actress was candid about dealing with her bun in the oven.

The 37-year-old actress showed off her curvy figure in an elegant, navy Roger Vivier Maxi "Boite de Nuit" gown that drew attention to her growing baby bump. Winslet is already mom to daughter Mia Threapleton, 12, and Joe Mendes, 9, with her ex-husbands, filmmaker Jim Threapleton and director Sam Mendes, respectively.

PHOTOS: Kate's changing look over the years

Winslet and Rocknroll secretly wed in December 2012 after about one year of dating, with the British actress' "Titanic" co-star Leonardo DiCaprio walking her down the aisle.

PHOTOS: Pregnant Oscar stars

Speaking to reporters about her third child at the Toronto International Film Festival on Sunday, Winslet says she actually doesn't want to know the gender of the baby.

"I just didn't want to. It's kicking like crazy today, actually," she said, according to USA Today. "I have actually really been enjoying this pregnancy. It's been good. I was tired in the beginning, but now it all feels okay."

PHOTOS: Kate Winslet's sexy red-carpet style

"I've been really good this pregnancy, partly because I was working in the beginning until about 20 weeks," she added of taking care of her body and watching her weight this time around. "I couldn't have it all go to my face. ... I don't know how much I can be bothered to have to lose the weight. It's such a pain in the a--. I'm not one of those people for whom it magically drops off."