Congratulations are in order for Amanda Seyfried and Thomas Sadoski.

While appearing on The Late Late Show Thursday night, the Life in Pieces star told James Corden that he and the expecting actress, who confirmed their engagement in September, were wed Sunday.

"We eloped," Sadoski shared after showing off a wedding band. "We just took off into the country with an officiant and just the two of us, and we did our thing…She's the person that I love, admire, respect most in the world..."

Corden and guest Vanessa Hudgens appeared touched by the story, which Sadoski further elaborated on.

"It was beautiful," he shared of the ceremony. "It was everything that it should be. It was just the two of us talking to each other."

Sadoski later added, "We had a great day. It was perfect."

The Last Word co-stars, who started dating while filming, confirmed they were expecting their first child in November, though Sadoski admitted Thursday that he was "not at all" ready for fatherhood.

"I'm more excited about this than I've ever been about anything in my life," he shared with Corden and Hudgens, "and I'm also more terrified about it than anything I've ever been in my entire life."

The couple's reps have not replied to USA TODAY's request for comment.