Mamma Mia! Amanda Seyfried announces baby news

Announcement comes just weeks after she got engaged!

The gorgeous Amanda Seyfried and her fiance Thomas Sadoski are expecting their first child.

The wonderful news was announced while she attended the launch of Givenchy’s new Live Irresistible fragrance in New York on Tuesday, People magazine reported.

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The event, in which she is the spokesmodel for seemed like the perfect time for her to debut her bump.

The Letters To Juliet actress looked absolutely stunning in a sheer Givenchy (of course) black mini-dress.

What a stylish mama-to-be!

Amanda and baby daddy Thomas, 40, got engaged in September.

She was papped wearing a silver band on her left ring finger while out and about with her cute dog Finn in New York City.

The adorable couple met while working together on the Broadway show The Way We Get By last year and ended up becoming romantically involved when they reunited on the set of their upcoming movie The Last Word in March this year.

The adorable Amanda Seyfried & Romain Spritzer at Givenchy in New York!

Amanda, whose breakthrough role came in the 2004 comedy Mean Girls, previously dated her Mamma Mia co-star Dominic Cooper and actor Justin Long.

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Another pregnant US actress that has got the media talking about her bump is the stunning Natalie Portman, who already has 5-year-old Aleph to husband Benjamin Millepied.

The 35-year-old Star Wars actress appeared on Jimmy Fallon in a flattering white dress and hilariously said: “Everyone thinks I’m about to pop. I’ve got months!”

Natalie told Jimmy that she was at a grocery store recently and the cashier said: “Almost, huh?”.

“No, not at all,” she replied.

That baby sure is growing quick!