Amanda Seyfried and Thomas Sadoski are married!

Before you go, we thought you'd like these...
Before you go close icon

Surprise! Thomas Sadoski let a big bomb slip on Thursday night's Late Late Show, revealing that he and actress Amanda Seyfried had already tied the knot.

When host James Corden tried to congratulate Sadoski on his engagement, the actor called Seyfried "my wife" and held up his shiny new wedding band.

WATCH: EXCLUSIVE: Pregnant Amanda Seyfried Has Date Night With Thomas Sadoski, Opens Up About Bill Paxton's Death

Revealing they made things official on Sunday, Sadoski added, "We eloped... we just took off into the country with an officiant and just the two of us, and we did our thing... We had a great day. It was perfect.""

The couple wrote their own vows and Seyfried's beloved dog, Finn, was also in attendance.

The newlywed Newsroom alum couldn't stop gushing about his bride, saying, "Listen, she's the person I love, admire, respect most in the world."

He went on to quip to Corden, "I know that you guys are close friends, and I know that she would want you to know, so don't tell anyone."

The couple, who confirmed their engagement in September 2016, are excepting their first child together later this year and couldn't be more thrilled to be first-time parents.

13 PHOTOS
Amanda Seyfried and Thomas Sadoski
See Gallery
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)
HIDE CAPTION
SHOW CAPTION
of
SEE ALL
BACK TO SLIDE

"I'm more excited to be a father with Amanda as my partner than I've ever been about anything in my entire life," Sadoski said on Harry Connick Jr.'s talk show in February. "I couldn't be more proud of her for who she is as a mom already."

Seyfried previously opened up to Vogue Australia about her plans for her future wedding, indicating that she planned to make it a low-key affair.

"I don't want to be the center of attention," she said, adding that she didn't plan to wear a white dress. "I get to go to premieres and get dressed up all the time. I went to the Met Gala last year in a wedding gown designed by Riccardo Tisci; I've played a bride a billion times."

Earlier this month, the couple's Last Word co-star Shirley MacLaine gushed to ET about seeing them in action.

WATCH: EXCLUSIVE: Shirley MacLaine Can't Stop Cradling Amanda Seyfried's Baby Bump at 'The Last Word' Premiere

"Absolutely the best! I watched their love affair, and I watched the baby almost being conceived," she quipped. "To watch the two of them together... they're truly in love."

For more on the couple's romance, watch the clip above!


Read Full Story

Sign up for Entertainment Insider by AOL and get the top celebrity, movies, music and TV news delivered to your inbox daily!

Subscribe to our other newsletters

Emails may offer personalized content or ads. Learn more. You may unsubscribe any time.

From Our Partners

No One Can Explain This Frightening Footage That Just Surfaced - And People Are Freaking No One Can Explain This Frightening Footage That Just Surfaced - And People Are Freaking
This Photographer Brilliantly Documented Crime on the Mean Streets of New York City This Photographer Brilliantly Documented Crime on the Mean Streets of New York City
Girl's Dad Brings Home A Strange Puppy - But Quickly Realizes It's Not Really A Dog At All Girl's Dad Brings Home A Strange Puppy - But Quickly Realizes It's Not Really A Dog At All