NEW YORK, NY - MAY 01:  Amanda Seyfried and Thomas Sadoski pose at the new Neil LaBute play "The Way We Get By" photo call at
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Amanda Seyfried and fiance Thomas Sadowski are expecting! The actor announced her pregnancy at a press launch for Givenchy on Tuesday, wearing a sheer dress to show off her growing baby bump.

Seyfriend and Sadowski got engaged in September. They met while starring in The Way We Get By play together in 2015, and then got to work together in The Last Word, when they began dating.

The Mean Girls star has been very vocal about her family plans recently, telling Marie Claire U.K. in July 2015 that "I want to be a mother, badly."

“I keep feeling like my eggs are dying off," she told Marie Claire. "I need to get on it. I want a child. Badly. I want to be a mother, badly. That's what I feel. I've been feeling it for like, two years.”