The 51-year-old actor was first linked to the 34-year-old Orange is the New Black star back in November, after the two were seen together at The Renaissance restaurant in The Manor Hotel. Sources told Grazia magazine that Cruise was "smitten" and "on cloud nine" after the "date," but the actor's representative denied the pair were dating soon afterwards.
A source now tells Page Six that Cruise and Prepon have been dating in secret all along. They are reportedly "still seeing each other" and are "extremely careful to keep it secret."
"It's the buzz on the set of her show," the person says.
Page Six reports that representatives for the actors continue to deny the romance as of Wednesday.
2014: The Year in Music [PHOTOS]