Mila Kunis and Ashton Kutcher are "so not dating."

The Hollywood twosome sparked rumours that they were embroiled in a new romance after they were pictured shopping for furniture on Sunday and going back to the actor's Hollywood Hills home.

But a source has told Us Weekly that there is nothing going on between them and they are just friends from their days starring together on That 70s Show.

"No! They're so not dating," a friend of Mila's told the publication.

"They've been friends for years. But she would never ever. Definitely nothing going on there."

The source added that the pair were out with "three other people" when they were seen leaving a restaurant in Studio City, California.

The Black Swan star has not been in a serious relationship since her split from Macaulay Culkin in early 2011 after eight years together.

Ashton is estranged from his wife Demi Moore following reports that he cheated on her on their six-year wedding anniversary. He has been linked to other women including Rihanna since then, but the Bajan singer has denied a romance.