Jack Blackis a proud boy dad.

“The biggest change in my life was starting a family. My wife and I having two boys and now they’re like 15 and 17 years old,” Black shares. “That’s an amazing life changer. One of the greatest things about my life, really.”

Never miss a story — sign up forPEOPLE’s free daily newsletterto stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories.

Jack Black with father Thomas William Black, Sons Samuel Black and Thomas Black and wife Tanya Haden on the Hollywood Walk of Fame on September 18, 2018 in Hollywood, California.David Buchan/Variety/Penske Media/Getty

Jack Black with father Thomas William Black, Sons Samuel Black and Thomas Black and wife Tanya Haden on the Hollywood Walk of Fame on September 18, 2018 in Hollywood, California.

David Buchan/Variety/Penske Media/Getty

“What’s your favorite part about being a dad?” Del adorably asks Black.

“What’s my favorite part of being a dad? I just love it when we have walks and talks,” the actor says. “And talk about life. Whenever they ask me a question or advice, something like that, which is rare now that they’re 15 and 17 years old, they’re like, ‘Ugh Dad, you’re so dumb.'”

“But whenever we’re able to share the things that are important in life, about friends and relationships and it really kind of gives life meaning,” Black says.

Jack Black at ‘Kung Fu Panda 4’ Premiere.Araya Doheny/WireImage

Jack Black attends the Los Angeles Premiere of Universal Pictures’ “Kung Fu Panda 4”

Araya Doheny/WireImage

In April, theSuper Mario Bros.star chatted with PEOPLE aboutwhat the biggest adjustment was when he became a dad. “What surprised me is how much I worry,” Black said.

The star continued, saying that when Sammy was born he knew instantly that he “was signing up for a whole lifetime of just wanting the best for them.”

“You spend so much time and energy just thinking about that,” he said. “Also, it’s harder than you think when you first start. Because you’re always wondering, ‘Am I doing this right? I don’t know If I’mdoing the right parenting thing.’ But you do the best you can, and you hope for the best.”

At the end of the day, though, “I just want them to be happy,” shared the actor-musician. “I mean, the hard thing is that being the child of a celebrity is not easy. It has some special stresses that are not [typical of] normal childhood stuff.”

source: people.com