The pair were seen together for about an hour at the gallery, and looked at art on both floors, reported Us magazine.
"They seemed very much in love. There is a real bond between them... She introduced him to me as her boyfriend. Their relationship is pretty much the same as it always was, beyond the fact that they said they split up, they still hang out all the time and hook up," a source said.
The 68-year-old actress sported an outfit as eclectic as the art displayed on the walls, showing off her unique style in colorful running shoes, a top and pants, and a leather backpack.