Ashton Kutcher and Mila Kunis have been spending more and more time together lately, and last night we spotted the former That 70's Show co-stars leaving Asanebo sushi in Studio City after a romantic dinner date!

The duo then returned to Ashton's massive Hollywood Hills mansion, and our photographer tells us they looked quite cozy when they dined together. "Ashton was touching Mila's hand and Mila was all dressed up," our lensman reveals. "She looked hot; this was definitely more than a dinner between friends -- this was a full-on date!"

These two may be friends with benefits, but will this romance last? Or is Mila just another rebound for the Two And A Half Men star?