Paris Hilton insists her romance with Benji Madden is "not a hoax"

Paris Hilton has spoken out about her relationship with Good Charlotte rocker Benji Madden - insisting it's "not a hoax!"

"I'm really happy!" she said during an interview on Ryan Seacrest's KIIS-FM radio show Friday morning. "I feel very safe and secure. He's a great guy.

"He's been my friend for a couple of years now, and we're really happy," gushed Hilton, who said Madden was by her side during the early morning telephone interview.

The hotel heiress said it was his idea to wear the matching ' BM' and 'PH' rings. "That was a very special present I got," Hilton said enthusiastically. "He's really sweet."

The socialite, 27, also said her parents approve of the relationship. "They're really happy for me!"

Benji's twin brother and bandmate Joel, is dating Hilton's best pal and 'Simple Life' co-star Nicole Richie, who recently gave birth to her first child, Harlow.

Throughout the interview, Seacrest teased her that their romance was just a spoof for Ashton Kutcher's new E! prank show, 'Pop Fiction', after she staged a scene with a "guru" - who was later exposed to be actor Maxie Santillan -  for the show.

"This is not for Pop Fiction," Hilton insisted. "It's not a hoax!"