Gerard Butler has admitting to hooking up with 'Real Housewives of Beverly Hills' star Brandi Glanville, but says he forgot her name. The actor, star of Olympus Has Fallen, confirmed the tryst on The Howard Stern Show on Monday, saying, "It was a one-afternooner, but it was fun.She is wild."

Glanville, 40, made the whole thing sound like a much bigger deal when she went public during the January 24 episode of 'Watch What Happens Live' saying she and Butler "had a little week of fun" and giving him an "11" out of ten rating. The 300 star was later informed of the comments by a paparazzo, who said, "Brandi Glanville says you're great in bed." Gerard's response? "Who's Brandi Glanville?" Ouch.

The actor recalled the incident to Stern, "And you know what I said: 'Who's Brandi Glanville?" Butler laughed, "Because one, I didn't know her last name and two, I didn't know she was a celebrity and I didn't know she was going to f--king tell people about it!" Once the actor figured out who she was, he called Glanville up, "I said one, 'I'm not very happy you did that because there are certain things you keep a little private.' And two, 'I'm sorry I said I didn't know who you were!"

Butler is now off the market, having dated girlfriend Madalina Ghenea for around 10 months. "What I love about her is she digs me. Not many people when they get to know me put up with me and she does," he confessed.

Gerard ButlerGerard Butler Wanted To Keep His Tryst With Brandi Glanville Quiet!

Brandi Glanville
Brandi Glanville Was All Too Happy To Tell The World About Sleeping With Gerard Butler