Ashton Kutcher and Topher Grace are missing their old sitcom THAT '70S SHOW so much, they're considering making a return - just months after walking away.

Grace and Kutcher left the long-running show earlier this year (05) to pursue movie careers. But former co-stars Wilmer Valderrama and Laura Prepon have learned that the actors could well be back on board after a meeting with Grace recently.

Prepon says, "He feels like he graduated from high school, and he totally misses it. He might come back. Ashton most likely is going to come back.

"It feels weird when you're not here, like your stable place is gone. This is our home base."

Despite his departure, Kutcher appears on tonight's (02NOV05) season opener with Bruce Willis, the ex-husband of his new bride Demi Moore.