Amanda Seyfried, Thomas Sadoski are parents

It's been a rapid fire of milestone moments for Amanda Seyfried and her Last Word co-star Thomas Sadoski.

A week after Sadoski's Late Late Show revelation that the couple eloped on March 12, the actress' publicist, Evelyn Karamanos, confirmed to USA TODAY that they welcomed their first child, a baby girl. No more details were provided.

Recounting their wedding ceremony, Sadoski said: "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... It was beautiful. It was everything that it should be. It was just the two of us talking to each other."

As for fatherhood, Sadoski told host James Corden, "I'm more excited about this than I've ever been about anything in my life and I'm also more terrified about it than anything I've ever been in my entire life."