The 51-year-old actor was reported to have ended his relationship with the former WWE star after one year together.
However, Clooney's representative Stan Rosenfield has now strongly dismissed the news, reported Daily Mirror online.
"A story published by a London tabloid... Concerning George Clooney and Stacy Keibler is not true. It is a total fabrication designed to sell newspapers," Rosenfeld said.
The original source had alleged, "She said George wants to be on his own again and has no intention of getting married.
"Stacy hoped they would be together long-term. It was a big breakthrough to spend time with his parents. But over the last few weeks George has pulled away from her."
The couple recently spent several weeks at Clooney's villa on Lake Como and travelling around Europe.
