The pregnant actress and her husband took off and secretly married on March 12, 2017.
The 40-year old husband made the announcement when he appeared on The Late Late Show with James Corden on Thursday, March 16.
When asked about Amanda, he referred to the “A Million Ways to Die in the West Actress” as ‘my wife’ and flashed his simple gold wedding band to which the audience cheered and clapped loudly.
There aren't pictures or clips from the ceremony yet, but when asked about details,“[We married on] Sunday,” says Thomas, who featured in the movie “John Wick”.
"We eloped. We just took off into the country with an officiant and just the two of us, and we did our thing."
Thomas goes on to say the decision to marry Amanda, 31, was an easy one because she is "the person who I love, admire, respect most in the world."
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The intimate ceremony “was beautiful. . It was everything that it should be. It was just the two of us talking to each other."
The actor added that they had dinner afterwards, took Amanda’s dog for a walk in the country and returned home to live their lives.
The couple are expecting their first child.
“I'm more excited about this than I've ever been about anything in my life,” Thomas says.
“And I'm also more terrified about it than anything I've ever been in my entire life. If I'm too confident then I'm just kidding myself.”
The couple announced their engagement in September 2016.