Friends of Jamie Foxx and Katie Holmes are reportedly frustrated that they continue to deny they are a couple. Last summer, Foxx called the rumors "100 percent not true.”

But a source tells OK! “Everyone wants them to just come out! It’s becoming the worst kept secret in Hollywood.” Rumors about the actors first surfaced in August, after the two were seen dancing together and getting close at a benefit party in East Hampton, N.Y. Holmes, 35, split with Tom Cruise after five years of marriage in June 2012. That summer Foxx denied a relationship, saying,  “In fact, it’s quite hilarious because we simply danced at a charity event along with a lot of other people.”

Still, the pair looked quite comfortable with one another over the Super Bowl weekend, though they watched the game separately in order to avoid paparazzi. Holmes flew to California to spend time with Foxx at his mansion, the New York Post reports. “Katie and Jamie have been dating for a while,” an insider tells InTouch. “They’re very 'Mission: Impossible' about their romance.”

Cruise certainly cannot be too happy about these reports, after he worked with Foxx on the film "Collateral" in 2004. “I love Jamie. First of all, he’s just an amazing human being, just so multi-talented,” Cruise said when Foxx received the MTV Generation Award at the 2013 MTV Movie Awards.