That '70s Show actress Laura Prepon has dismissed rumours that she is dating Tom Cruise.

The 34-year-old star, who is currently starring in Orange is the New Black, insists that concerns about her love life are "unbelievable".

Speaking to SheKnows, Prepon said: "It's just so funny that, when people don't know, they just make stuff up, [like] apparently I'm dating Tom Cruise right now.

"And apparently he doesn't want me doing the show because I portray a lesbian and I'm a Scientologist. This is false; where are they even getting this stuff? It's unbelievable to me."

Tom has not been seen to be dating anyone since his marriage split from Dawson's Creek star Katie Holmes in 2012.