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But has he met Joe and Tina?

Ashlee Simpson and Boardwalk Empire actor Vincent Piazza have been dating since June -- and after the Emmy Awards on Sunday night, Piazza, 26, was ready to introduce his love to mom and dad.

The actor's parents flew in for the big Emmys Sunday, and met divorcee Simpson, 26, for the first time. The foursome were spotted dining together at HBO's star-packed afterparty at L.A.'s Pacific Design Center.

Although the couple walked several red carpets together over the glittery weekend -- holding hands and even making out at the table at HBO's bash -- Piazza told Us Weekly that their typical date-nights are way more casual.

"I'm a real low profile guy," Piazza said. "So a date night for me is kind of curled up at home and watching something . . . have a nice glass of wine, a nice meal and we're all set."

So far, he and the actress-singer (she filed for divorce from Pete Wentz in February) haven't butted heads yet, he added.

"It's been really great. So there is no head butting," joked the actor, "You'd see the marks if there were!"