LOS ANGELES, Calif. -- A little more depth would have helped make "Public Enemies" more engaging than it actually is. On a visual scale, it's technically proficient and impressive, but on an emotional level, it lacks the cinematic gravitas to stand alongside classic gangster epics like "Bonnie and Clyde" and "The Untouchables."

But during a visit to a Chicago restaurant, the star certainly brought joy to one unsuspecting waiter with a reported sizable tip.

Zac will appear in an episode of the hit HBO series this coming season, a rep for the cable network confirmed to Access Hollywood.

LOS ANGELES, Calif. -- With the Sundance Film Festival, the Oscar nominations and the presidential inauguration, find out where the stars celebrated this week.

The superstars were collectively ranked number nine on Vanity Fair's annual "100" list, where they joined such luminaries as former Vice President Al Gore and Apple CEO Steve Jobs at the top of the rankings of the magazine's "New Establishment."

LOS ANGELES, Calif. -- Plus, "Cindy Brady" has too much wine and gets sick during a radio interview. Ryan Gosling heads to Capitol Hill for a good cause. And did Amy Winehouse attack yet another stranger?