That's the word on the streets, though the guilty party denies it.
Jared Leto's rep has come out swinging and slamming a National Enquirer report that Jessica Simpson cheated on Tony Romo with his client.
"There is no truth whatsoever to that," Leto's manager, Jason Weinberg, told Us Weekly of the rumor that Jared and Jessica are boinking.
Jessica Simpson and Jared Leto: Supposedly not hitting it.
As for Jessica Simpson and Tony Romo, well, it's still a pretty big mystery (as we've discussed) whether or not they are together.
Simpson paid tribute to Tony's team - sporting a Dallas Cowboys cap while leaving Cabo San Lucas, Mexico, solo, on Thursday.
With Ashlee Simpson and Pete Wentz now man and wife, tell us what do you think: will Jessica Simpson and Tony Romo get married?