Katie Holmes Laughs Off Tom Cruise Divorce

Katie Holmes is officially happy -- at least that's the way it appeared in NYC yesterday, when the actress dropped by an ice cream parlor with her daughter Suri ... and finally had a good laugh.

It's the first time Katie's smiled that big since she filed for divorce last week. In fact, it's the first time we've seen her smile that big in a while.

Of course, Katie and Suri weren't alone -- they stopped by the East Village ice cream shop with some friends. Oh yeah, and 4 hulking bodyguards.