The rumored engagement of Leonardo DiCaprio, 29, and supermodel Gisele Bündchen, 23, doesn't seem to be slowing down The Aviator star's partying ways. On June 9, DiCaprio hung with actor pal Lukas Haas at Hollywood's Concorde nightclub, where they invited about a dozen to come to his Hollywood Hills home for a nightcap, an eyewitness says. Two days later, he hit the scene at Prey, another L.A. hot spot, where he again reportedly hand-picked ladies for a late night get-together around 3 a.m.

However, the next day, he and Bündchen looked like the picture of domestic bliss as they shopped for plants in New York City. A source tells Star that the Brazilian-born model is waiting for DiCaprio to outgrow his party-monster ways. Though they do want to marry, "she's been hesitant to set a date because of his partying," says the source. For now, Bündchen is taking a cautious approach to marriage. "Because she hasn't agreed to marry him yet," says the source, "she figures he's free to do what he wants. But she's not going to accept his marriage proposal until he grows up."

-- BRENDA YOU