Mini Celebrity Royals

As the world celebrates the birth of William and Kate's new prince, meet the famous tots (Blue Ivy! Kingston! Maddox!) who are sure to rule Hollywood some day

ROCK ROYALTY:
KINGSTON & ZUMA ROSSDALE

When not at play, you'll find Gwen Stefani's little rockers-in-training, 4½ and 7, on tour with mom and dad Gavin Rossdale. "Kingston still likes the drums. [And Zuma] is really into the guitar," Rossdale told PEOPLE of his budding artists.