Klum takes her exuberant children Leni, 5, and Henry, 3, for playtime in an N.Y.C. park. Halle & Nahla, Lauren Conrad, Reese Witherspoon and more

CASTING A SPELL

They're all grown up! Harry Potter and the Half-Blood Prince stars Rupert Grint, Emma Watson and Daniel Radcliffe hit the red carpet – in front of some spirited Quidditch fans! – Tuesday at their movie's world premiere in London. The sixth installment of the fantasy series hits U.S. theaters July 15.