The Richie-Maddens

They're now a family of four! See how Joel Madden and Nicole Richie dote on daughter Harlow and son Sparrow

MAKING A MEMORY

The couple and their children strike a pose May 16 while touring Sydney's Taronga Zoo, where they fed the animals and mingled with a giraffe. "Can't get enough. We'll be back fo sho," Madden Tweeted.