Credit: London Entertainment/Splash News Online

Coming as no surprise, the Beckham boys, Brooklyn, 12, Romeo, 9, and Cruz, 6, are used to their high-profile parents by now.

In fact, dad David Beckham tells Us Weekly that now that his sons are older, they have a new appreciation of his and Victoria's Beckham's work -- in specific, his new ads for his line of underwear with H&M.

"They gave me a little bit of flack for that, but they're very proud of it," he explains of the campaign where he poses in just underwear, adding that they say, "There's daddy in underpants on big billboards."

As for the youngest member of the Beckham family, little Harper, 7 months, it's dad David, 36, who's in awe.

"Obviously it's amazing [to have a girl in the mix]. It's something new, because we've got three sons and to have a little girl in the family is amazing," the L.A. Galaxy soccer star tells Us.

"I love changing diapers, it's one of my passions," he adds with a smile.