Jerry O'Connell had nothing but nice things to say about his ex-girlfriend Giuliana Rancic despite her claims that he cheated on her when they dated.

Rancic wrote in her new book "Going Off Script: How I Survived a Crazy Childhood, Cancer, and Clooney's 32 On-Screen Rejections," that her then-boyfriend O'Connell had an affair with Spice Girl Geri Halliwell, aka Ginger Spice.

And when O'Connell appeared on "What What Happens Live," a caller asked the actor to explain himself to which O'Connell shared a very diplomatic response.

"For those of you who don't know, Giuliana Rancic is a personality on another network," O'Connell said. "And we dated, then we didn't date."

He added, "I don't want to say anything negative. She's a very nice girl. We had a very fun time. It was decades ago. I don't believe cell phones were used then. It was like horse and buggy... It was a while ago."

O'Connell married model Rebecca Romijn in 2007. They have two children together.