LEONARDO DiCaprio was left starstruck after meeting veteran actor Mickey Rooney at a Hollywood event over the weekend (04-05Jan14).

The Great Gatsby star attended the Paramount Pictures luncheon on Sunday (05Jan14) in California, where he scored an autographed poster from one of The Babes on Broadway actor's movies.

A source tells the New York Daily News, "Leo was on cloud nine about it. They spent a fair amount of time talking about old movies together."