Mila Kunis has called reports that she is dating Ashton Kutcher "absurd".

The Hollywood stars have sparked speculation they are romantically involved after being photographed together on several occasions. Mila has addressed the claims, insisting they are just friends.

"It's very absurd!" Mila told Ben Lyons of TV show Extra.

"Ive never commented on my personal life, Im not going to start commenting on my personal life now."

The Black Swan star and Ashton have known each other since they appeared on TV series That 70s Show between 1998 and 2006. Reports have suggested Aston has held a flame for Mila since they starred together on the series. However Mila has hit back at the rumours.

"It's a friend. A friend is a friend," she said.

Mila and Ashton recently attended a reunion for the show. Mila also went to the event with stars Wilmer Valderrama and Laura Prepon.

"It was Laura, myself, Wilmer, and Kutcher," she said. "We just sat in a room for 20 minutes and talked about what it was like to film the show."

Mila, 28, and Ashton, 34, were spotted last weekend on a three-day getaway to Carpinteria, California.