Then came "Dancing with The Stars," "Brothers & Sisters," "Switched at Birth," "Days of Our Lives," and lots of roles in between.
Now, he's thrilled about his latest role in the new World War II movie "Murder Company," which is reportedly based on actual events involving a mission that's never officially been acknowledged.
"Sometimes, we didn't have to act. The dirt and sweating and it is warm and you're getting shot it. It was phenomenal!" said Marini.
The film takes place during the D-Day invasion. Some U.S. soldiers are ordered to get a member of the French resistance behind enemy lines so he can assassinate a high-powered Nazi. Marini says this is 100% the most serious role he's ever played.
"I had a blast, but very serious, all the way to the end, this guy has a mission, and he is going to accomplish it, no matter what it is," said Marini. "I wanted to be part of this film because what it really meant and what it explains. We need to not go back to these kinds of times."
During the war, Marini said his late grandmother saved members of the Jewish community.
"My grandma was really involved during that time, and I wish she was still alive to see it, for sure."
"My entire thought during the film is, like, this is my wife, this is my family, this is all of it!"
"Murder Company," which also stars Kelsey Grammar, is playing now in select theaters and streaming.