Bill Murray was in a playful mood on the Monday night episode of Watch What Happens Live on March 31. While discussing his latest film alongside Naomi Watts, the comedian surprised everyone at the Bravo Clubhouse by unexpectedly kissing his co-star on the lips.

The awkward moment came during the nightly fan Q&A when Amina from Washington DC asked Watts to name the “best onscreen kiss” of her career.

Before Watts had a chance to respond, Murray leaned in, tilted her head back, and gave her a kiss. When he pulled away, he gave the camera a thumbs-up, adding to the surprise.

“You’ve got lipstick on your face,” Watts said, pointing to the pinkish-red lipstick smeared across Murray’s mouth.

“OK. Did I go red?” Watts uncomfortably asked, while Murray added, “That was too easy.”

Watts proceeded to answer the fan’s question, telling the audience, “Well, of course, it’s Billy Crudup, my husband.”

The two actors first met while working on the 2017 thriller series Gypsy. Watts recalled realizing their chemistry was genuine during a scene in which Murray threw a pillow across the room amidst a love scene.

“Are you sure it wasn’t the day you got to work late?” Murray quipped.

Murray and Watts were on WWHL to promote their new movie The Friend, which comes a decade after they first starred together in St. Vincent.

“You clearly got along well enough that you wanted to work together again,” Cohen pointed out, to which Murray replied, “It was good. Well, you know, she’s not from our country. And I don’t know what’s going to happen in the upcoming weeks and months but I hope she’s allowed to remain,” referring to President Donald Trump‘s deportation policies.

When Cohen asked Watts — who’s from the UK — if she’s “worried” about getting deported, she replied, “No. Well, who knows?”

Watch What Happens Live airs Sunday through Thursdays at 10 p.m. ET on Bravo. New episodes are available to stream the next day on Peacock.