The 40-year-old actor couldn't help but gush about the 44-year-old actress while discussing their high-profile marriage in the April issue of Ocean Drive magazine.
"I just married the girl that I love. That was it," Manganiello said when asked if he ever expected to be part of a celebrity couple. "I really do believe that we were put on the planet to be with each other."
"From the first date, it was just like wow! It was so easy in all the ways that you want it to be easy and challenging in all of the most fun ways possible. So I knew right away and that was it," he added.
Manganiello and Vergara married in 2015 in Palm Beach, Fla., after more than a year of dating. The actor, who described his wedding as "the most incredible weekend of [his] life," said he and Vergara have only grown closer since.
"The two of us knew that once it became public that we were together ... that [it] would change a lot of things, and she is the only woman on the planet that I was willing to go through all of that for. Because she's the greatest," he gushed.
"All that pressure has just brought us closer together," the star said. "At the end of the day, it's really nobody else's business but ours. It's just that I love her and she loves me and here we are. And there is a price for that, when living in the public eye."
Manganiello and Vergara celebrated their second wedding anniversary in November. The actor said in the April issue of Cosmopolitan U.K. that the most romantic thing he's done for Vergara was to write her a book for their first anniversary.
"I wrote her a book as a gift for our first anniversary," he shared. "It was about how we met -- as well as our courting -- and was about 40 pages long."