The hardest working man in show biz is going to pop the question to his lady love, Radar Online has exclusively learned.

Ryan Seacrest and Julianne Hough have been dating for less than a year, but sources close to the couple have revealed that the American Idol host has already picked out an engagement ring and is preparing to propose.

"Ryan already has the ring -- and it's a rock -- four to five carats," one source confirmed to Radar Online.

"Money was no object for Ryan... expect the Rolls Royce of engagement rings.

"He's had it for awhile and is in the process of planning the engagement. It's going to happen within the next few months or so!"

Seacrest, who met the dancer turned actress early last summer, dismissed rumors he popped the question over the holidays.

"I'm not engaged," he told People, but added "I'm very happy."

Another source close to Seacrest played coy when asked to confirm or deny the upcoming engagement.

"If Ryan was planning to propose, why would I spoil the whole surprise for him?" the insider said, but gushed about how in love the couple are.

"I don't think I've ever seen him like this over a girl before, ever... they fit together so perfectly.

"All his family adore her too, and I know his mom would be really happy to see him settle down with Julianne and work on giving her some grandchildren!"

Credit: Radar Online

Jessica Simpson is off the market!

Sources confirm to Us Magazine that the singer, 30, became engaged to beau Eric Johnson on Thursday, just days after Us broke the news that her ex-husband, Nick Lachey, popped the question to Vanessa Minnillo, his love of nearly five years. Simpson and Lachey, 37, split in 2005, after three years of marriage.

On Saturday, Simpson flashed a sizable ring on her left hand during an appearance at Dillard's at Oak Park Mall in Kansas City.

The Texas native began dating the former NFL player in May while he was estranged from his first wife, stylist Keri Johnson; their divorce was finalized five months later.

Though Ashlee Simpson-Wentz recently told Us that her sister "is happy, so we're all really happy," sources insist that most of Simpson's friends are concerned about Johnson's motives for dating the singer.

"Eric was never that successful in the NFL, but he's always wanted the celebrity lifestyle," a source told Us in October. "Her friends do not trust him."

Credit: Us Magazine

Lauren Conrad got an unexpected surprise over the weekend: A marriage proposal!

The Hills alum, 24, was greeted Friday at the Hurley Walk teen fashion competition in Huntington Beach, Calif., by a man who scrolled on his back in black makeup: "LC, Marry Me."

LC, of course, is taken: She has been dating actor Kyle Howard for some time.

Could a wedding be on the way? Probably not.

"I'm not someone who feels like a pressure to get into that," she told Access Hollywood last year. "I think that I'm still pretty young and I've got a while to do all I want to do. I think that when you have kids, it's all about them. So I think that I need to be selfish for a little bit and do it all about me."

Credit: Us Magazine