Zac & Leo: New Bro-Mance!

Leonardo DiCaprio must think it's time to bring a "new guy" into his super-VIP entourage of friends--which includes the likes of Kevin Connolly and Lukas Haas.

OK! recently saw Leo chatting up High School Musical star Zac Efron on his way to the men's room at the GQ Men of the Year Awards held at the Chateau Marmont Hotel in Hollywood on Nov. 18.

Leo thanked Efron for coming to the party (Leo was honored as a man of the year along with Barack Obama) and gave him his cell phone number telling the HSM cutie, "Give me a call and let's  shoot the sh*t sometime."

Looks like Zac took Leo up on his offer--Just days later on Nov. 21, the two were spotted chatting and laughing courtside at an L.A. Lakers  vs. the Denver Nuggets game at the Staples Center.