Actress Katie Holmes and baby Suri stopped to sign autographs outside of the Schoenfeld Theatre on Broadway, where Holmes is performing in "All My Sons."

Katie graciously greeted fans -- her cheery disposition may have something to do with the fact she's celebrating the big 3-0 today! What will superstar husband Tom do to celebrate the occasion? We'll find out tonight at the L.A. premiere of "Valkyrie."