T.R. Knight, snapping pictures with fans during a dinner at L.A. eatery Izaka-Ya by Katsu-Ya. The dressed-down Grey's Anatomy cutie struck up a conversation with two women at the next table, and after chatting with them for most of the meal, he asked a fellow diner to take pictures of the group before leaving. Says an observer: "He couldn't have been nicer."
Ben Affleck, avoiding all the New York marathon traffic and sneaking into Central Park for some quality play time with daughter Violet over the weekend.
Jack Black, heading straight for the buffet table during the afterparty for Margot at the Wedding at Hollywood's Social. The funnyman, who came with his wife, also took time to hug and kiss his wife, high-five director Noah Baumbach and crack up costar Jennifer Jason Leigh, who laughed so hard that she doubled over.
Jackson Lee / Ahmad Elatab / Splash News Online
Ashley Olsen spending quality time with a certain older man at the Gramercy Park Hotel's rooftop bash following Duran Duran's Red Carpet Massacre performance on Broadway. And no, it wasn't Lance Armstrong: The actress had a mini-Full House reunion with costar Bob Saget. Once inside the bar, Olsen met up with sister Mary-Kate, and the two bounced around, happy to see each other. Ashley took off with Saget shortly after arriving, but Mary-Kate and her pals (who danced scandalously from her box seats during the concert) stayed with her friends well after the party ended.
By REAGAN ALEXANDER, ALEXIS CHIU, LESLEY MESSER and AARON PARSLEY
Monday's Couples Watch >