PIC: Charlie Sheen, Denise Richards Go on Dinner Date?

 Carla Sommers/startraksphoto.com

Charlie and Denise reunited?

On Thursday, Charlie Sheen and ex-wife Denise Richards happily smiled for the cameras after dining at NYC's Da Tommaso restaurant. Their daughters Sam, 7, and Lola, 6, were nowhere in sight.

But don't mistake the friendly meal for anything romantic between the pair, who divorced in 2006 after four rocky years together. "She is here filming 30 Rock," a source close to Richards, 40, explains to Us Weekly. (Richards is guest-starring on an episode of the NBC hit.)

"They went out to dinner and there were three other people with them! Just friends. All innocent and nobody sketchy!"

PHOTOS: Hollywood's friendliest exes

Indeed, with their ugly split long behind them, Richards and Sheen, 46, have been keeping the peace for awhile, and were snapped with both of their adorable daughters near L.A. last month to cheer on Lola's baseball game.

"There was a beautiful love story between he and I," Richards told Us back in June. Richards became a mom for the third time over the summer — adopting daughter Eloise, now 4 months old. And Sheen, despite an unforgettably volatile couple years, is also keep things friendly with third wife Brooke Mueller, whom he officially divorced over the summer after an ugly custody battle over twins Bob and Max, 2. "Harmony is our goal," Sheen, 46, said in August.

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