He also has a sense of humor about their 27-year-old age difference. When pressed by fans about it during a recent Instagram story Q&A, he revealed a self-deprecating side.
For instance, when one follower asked what advice he has for couples with massive age gaps, Cook had this to say: "The only thing you have to do is plan that your deaths will be somewhat far apart."
Another asked if their respective families approve of their relationship.
"I love her family and we are pretty close and go to dinner and hang. My family pretty much all died years ago but @_courtneycook_ my sister likes Kelsi a lot," Cook wrote.
One asked how they met.
"We met at a game night I host at my place," he wrote. "We were friends for a while and soon after fell in like with each (other) and then upgraded to love."
Another asked what they liked most about one another.
"Kelsi is smart, kind, creative, loyal & honest," Cook responded. "As for me I think Kelsi would say I'm tolerable."
Must have been some game night...