Dylan McDermott and Maggie Q are reportedly more than just workmates.

McDermott, 53, and Q, 35, who both star in CBS' police procedural drama "Stalker,"  are now romantically involved, a show insider told People.

The onscreen crime-fighting pair first sparked dating rumors after they were spotted getting cozy while shopping in Brentwood, Calif. last month. See their photo here.

And just last Saturday, Oct. 25, the rumored couple reportedly had a romantic dinner together at Santa Barbara's Olio e Limone.

The pair arrived at the restaurant a little early and were sent outside to wait for their table, a source told Us Weekly.  And when their place was ready, the stars sat next to one another instead of sitting opposite each other. The two are said to have remained very close and touchy-feely for the entire duration of their dinner.

"They were very flirty, smiling at each other, canoodling," an eyewitness told Us Weekly. "At one point she was feeding him at the table."

McDermott, who played Ben Harmon on "American Horror Story: Murder House," was previously married to Shiva Rose from 1995 to 2009. The exes share two daughters together, Colette, 18, and Charlotte, 9.

The "Insurgent" actress, on the other hand, previously dated Hong Kong actor Daniel Wu. The two both starred in the 2002 Hong Kong action-thriller film "Naked Weapon."

Neither McDermott nor Q have publicly acknowledged their rumored off-camera romantic relationship. In their social media accounts, all of their posts have instead been about their new series "Stalker."

"I've had this idea in my head since 1998," show creator Kevin Williamson told E! News of "Stalker." "I had a little brush with stalking after 'Scream 2.' That's when I first became aware of the TMU, the Threat Management Unit, of the LAPD. And I thought, 'Well, this is a great idea for a TV show.'"

"I had a zealous horror movie fan that just felt the need to break into my house and let me know what a zealous fan he was," Williamson added. "It was scary. It wasn't to the extent such as [actress] Rebecca Schaeffer who ended up being a true victim of stalking and was murdered. She actually began the TMU. Her death allowed there to be the first stalking laws made in California."

"Stalker" airs every Wednesdays at 10:00 p.m. on CBS.