Dave Franco and Alison Brie are spending a lot of time together while promoting their new movie “Together” … but, they’re clearly head over heels with one another — locking lips during the press tour.

The husband and wife co-stars were all over each other during a pop up event for their new flick Saturday … with the extras around them kissing too.

The poster for their new flick depicts a couple’s lips stuck together, essentially forming one set of lips … so, looks like these shots are an homage to that.

Dave and Alison flash big smiles for the camera, too … nothing horrifying about these grins!

The pair have been doing a total marketing blitz for “Together” — which came out at the end of July — including one interview where Franco said he’d consider playing alleged murderer Luigi Mangione in a biopic. The movie’s getting great reviews … though it hasn’t really taken off at the box office.

Franco and Brie met at Mardi Gras in New Orleans back in 2011 … and got engaged in 2015, marrying a couple years later.

This isn’t the first time they’ve collaborated on a project, BTW … having previously worked on movies like “The Little Hours” and “The Rental.”