Leonardo DiCaprio Films Diner Scene With Regina Hall for P.T. Anderson Movie

Leonardo DiCaprio‘s all-in on Paul Thomas Anderson‘s new movie … shooting in NorCal for the second day in a row — and working alongside another uber-talented star.

TMZ has obtained video and photos of Leo out at a restaurant Tuesday afternoon opposite “Scary Movie” legend Regina Hall and a younger, unknown actress … and it looked like he brought some cool confidence to the scene.

Check out the vid — looks like PTA is giving the Oscar winner some notes while he’s chowing down. He’s clearly keeping calm — although we’re sure a regular patron or two might’ve flipped out! The reason we say that … this appears to have been filmed out in the open.

Eyewitnesses tell us the production team didn’t fully shut down the establishment for this shoot — and, instead, pulled an old H’Wood budget-saving move by allowing regular business to flow while they only took up a few booths to film the scene. That’s what’s being claimed anyway … and we’ll say this, it sure looks like normies might’ve been hovering around.

Leo and Regina Hall grabbing lunch together??? Definitely a shock if you happened to be passing through his restaurant. To be fair, PTA’s sorta known for his low-budget, indie filmmaking … even if Leo’s normally used to more luxurious catering and a slightly larger budget — not to mention a much more closed set than what appears to be going on here.

Also worth noting … all these pics and videos of Leo filming are low-key giving away a lot of clues about the film’s story. To be clear, we don’t officially know anything about the plot yet … but if this doesn’t look like some sort of family outing, we don’t know what does!

Anyway, just another day on the job for Leo. We broke the story … LDC was filming in the same small little NorCal town Monday as well, though that scene was a bit more frantic.

Leo was in full-blown costume and makeup Monday in a dirty-looking trench coat and disheveled beard — definitely appearing worse for wear while cop cars seemingly chased him down.

The untitled flick doesn’t have a release date yet or much more in the way of details … but we do know Sean Penn‘s in it — and it seems only a matter of time before he’s spotted too.