The image finds both actors sitting opposite to each other in front of a computer with their hands and feet touching and was reportedly taken in February.
Foxx previously denied reports that he was dating the Dawson's Creek alum in October 2013, after a video of the actors dancing together in the Hamptons surfaced online.
Holmes' rep also denied the reports claiming that the actors were "only friends."
"This is not some intense romance," an insider told People magazine. "Jamie and Katie are friends and have been for a long time. They are two adults who are attractive and single, and so apparently conclusions will be drawn."
According to Us Weeky Holmes and Foxx have been carrying out an "undercover romance" since Foxx "wooed [Holmes] at a benefit in the Hamptons." The new issue of the celebrity gossip magazine is said to include details about their secret relationship.
Holmes was previously married to the actor Tom Cruise, whim she divorced in 2012. The former couple share an 8-year-daughter named Suri.