Eddie Cibrian denies cheating on Brandi Glanville with Piper Perabo

Eddie Cibrian has denied allegations he once cheated on Brandi Glanville with Piper Perabo.

The actor responded to his ex-wife's claim that he cheated on her with his co-star Piper while they were working together on the 2005 horror The Cave.

Brandi told Page Six in an interview published on Tuesday that Eddie and Piper were "f**king" during the movie's production.

"I'm sad I have to address this, I really believed that we had come a long way, but this was untrue 19 years ago and it's untrue now," Eddie responded hours later via a statement to the publication. "Just because someone thinks something might be true does not make it true. This is all so unnecessary."

The actor concluded, "Fun times at the Christmas table await."

In her Page Six interview, Brandi described Piper as being "a real c*** to me" when she visited the set of The Cave. The television personality recalled the actress "flirting with Eddie" in front of her.

"I was like, 'Am I here? Am I the only person (seeing this)?'" Brandi recounted. "Like, 'What is happening?'"

Brandi and Eddie were married from 2001 to 2009 and they share two children: Mason, 19, and Jake, 15.

They separated in 2009 after Eddie had an affair with LeAnn Rimes, who he married in 2011.