Jillian Michaels Leaving Biggest Loser, Wants Kids

Credit: Mitchell Haaseth/NBC

Bye, bye, Jillian Michaels.

The tough-talking trainer and fitness guru announced that she is leaving the NBC reality competition that made her famous.

"Season 11 of Biggest Loser will be my last :) have to finish out my contract," Michaels, 36, Tweeted earlier this week.

Michaels explained her decision -- and her desire to have kids. "I want to take a year off TV and focus on becoming a mommy and doing more charity work," she wrote.

Michaels launched her own weight-loss show over the summer, Losing It -- which also inspired her, she said.

"Shooting Losing It also had big impact on me," she said of the series, in which she helped kids slim down. "Living with kids, I saw firsthand what I was missing."

As for Michaels' replacement on The Biggest Loser? "They already hired her," she told a Twitter follower. "Using my last season to help launch her in season 11."

Michaels' final Biggest Loser season gets underway this January.

Tell Us: Will you miss her?