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08/31/2015

Melody Chiu with reporting by Reagan Alexander

He just celebrated his first birthday, but Pete Wentz‘s son Saint Laszlo (with girlfriend Meagan Camper) is already taking after his dad.

“He gives me the same eyebrows that I give him when I’m like, ‘Are you serious?’ ” the star told PEOPLE Sunday at MTV’s Video Music Awards, where Fall Out Boy picked up best rock video for “Uma Thurman.” “There is nothing like getting that from a 1-year-old. I’m like, ‘That’s my look that you’re giving me!’ ”

Saint has also become fast friends with Patrick Stump‘s son, Declan, who turns 1 in October.

“We were on tour all summer, so they got to hang out,” says Wentz.