Tom Hanks on Jury Duty -- Domestic Violence Case

Tom Hanks is deciding the fate of a man accused of battering a woman -- TMZ has learned, the Academy Award winning actor is serving as a juror in an intense domestic violence case ... and he's doing a bang-up job.

We're told Hanks is in the zone right now in the jury box, assiduously taking notes about the case.

He's keeping things casual though, wearing a black long-sleeve shirt, dark blue jeans, and black-rimmed glasses.

We're told he's being VERY attentive, hanging on every word of witness testimony.

Or maybe he's just acting. He's good at that.