That '70s Show (search) star Ashton Kutcher (search), who's busy romancing Demi Moore (search) and chumming around with P. Diddy, isn't ready to leave his comfortable TV nest just yet.

Kutcher, who plays dimwit slacker Michael Kelso on the Fox sitcom, has inked a new deal taking him through 2005 and upping his per-episode fee to the $250,000-$300,000 range -- or about $8 million for a full season, according to The Hollywood Reporter.

Kutcher was already signed for the 2003-04 season. But show producer Carsey-Werner-Manda- bach pulled a coup by keeping him around for another year since he's one of Hollywood's hottest, most-talked-about talents - and could have bolted for greener pastures.

In addition to his much-publicized romance with Moore, Kutcher produces and stars in MTV's Punk'd - in which he pulls pranks on his celebrity friends - and is set to star on the big screen in The Dinner Party with Bernie Mac.

The readers of People magazine recently voted him "The World's Hottest Bachelor" - barely edging out Prince William.

Kutcher has starred on That '70s Show since its 1998 premiere along with Laura Prepon, Topher Grace, Danny Masterson, Wilmer Valderrama and Mila Kunis.