Amanda Seyfried reveals she's expecting her first child with fiance Thomas Sadoski

Amanda Seyfried is going to be joining the mommy club.

The 30-year-old actress announced her pregnancy at a Givenchy event in New York City on Tuesday, just two months after confirming her engagement to Thomas Sadoski. At the event, Seyfried was clad in a sweet black mini dress that showed off her tiny baby belly.

This will be the first baby for Seyfried and Sadoski and the two haven't revealed whether they're planning to marry before or after baby.

Seyfried and her fiance, 40, met while working together on the off-Broadway show The Way We Get By last year, and started dating after reuniting on the set of their film "The Last Word."

Congrats to the soon-to-be parents.

PHOTOS: A look at the happy couple

13 PHOTOS
Amanda Seyfried and Thomas Sadoski
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Amanda Seyfried and Thomas Sadoski
PARIS, FRANCE - JUNE 24: Amanda Seyfried and Thomas Sadoski attend the Givenchy Menswear Spring/Summer 2017 show as part of Paris Fashion Week on June 24, 2016 in Paris, France. (Photo by Pascal Le Segretain/Getty Images)
PARIS, FRANCE - JUNE 24: Amanda Seyfried and Thomas Sadoski attend the Givenchy Menswear Spring/Summer 2017 show as part of Paris Fashion Week on June 24, 2016 in Paris, France. (Photo by Pascal Le Segretain/Getty Images)
NEW YORK - JUNE 08: Actors Amanda Seyfried and Thomas Sadoski attend the 30th Annual Women of Achievement Awards at The Edison Ballroom on June 08, 2015 in New York City. PHOTOGRAPH BY Photo Image Press / Barcroft Media (Photo credit should read Photo Image Press / Barcroft Med via Getty Images)
NEW YORK, NY - JUNE 07: (EDITORS NOTE: Image has been processed using digital filters.) Actors Thomas Sadoski (L) and Amanda Seyfried attend the 2015 Tony Awards at Radio City Music Hall on June 7, 2015 in New York City. (Photo by Mike Coppola/Getty Images for Tony Awards Productions)
NEW YORK, NY - JUNE 07: Thomas Sadoski (L) and Amanda Seyfried attend the American Theatre Wing's 69th Annual Tony Awards at Radio City Music Hall on June 7, 2015 in New York City. (Photo by D Dipasupil/FilmMagic)
NEW YORK, NY - MAY 19: (L-R) Actors Thomas Sadoski and Amanda Seyfried attend 'The Way We Get By' opening night after party at Four at Yotel on May 19, 2015 in New York City. (Photo by Astrid Stawiarz/Getty Images)
NEW YORK, NY - MAY 19: Actors Thomas Sadoski and Amanda Seyfried attend 'The Way We Get By' opening night after party at Four at Yotel on May 19, 2015 in New York City. (Photo by Jim Spellman/WireImage)
PARIS, FRANCE - JUNE 24: (L-R) Actress Amanda Seyfried and her companion Thomas Sadoski attend the Givenchy Menswear Spring/Summer 2017 show as part of Paris Fashion Week on June 24, 2016 in Paris, France. (Photo by Bertrand Rindoff Petroff/Getty Images)
NEW YORK, NY - MAY 19: (L-R) Actors Thomas Sadoski and Amanda Seyfried attend 'The Way We Get By' opening night after party at Four at Yotel on May 19, 2015 in New York City. (Photo by Astrid Stawiarz/Getty Images)
NEW YORK, NY - MAY 01: Amanda Seyfried and Thomas Sadoski attend the 'The Way We Get By' Meet & Greet at Second Stage Theatre on May 1, 2015 in New York City. (Photo by Walter McBride/WireImage)
NEW YORK, NY - MAY 01: Amanda Seyfried and Thomas Sadoski attend the 'The Way We Get By' Meet & Greet at Second Stage Theatre on May 1, 2015 in New York City. (Photo by Walter McBride/WireImage)
NEW YORK, NY - MAY 01: (L-R) Playwright Neil LaBute, actors Amanda Seyfried, Thomas Sadoski and director Leigh Silverman attend 'The Way We Get By' cast meet and greet at Second Stage Theatre on May 1, 2015 in New York City. (Photo by Slaven Vlasic/Getty Images)
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