Alison Sweeney on Her 'Biggest Loser' Replacement Bob Harper: 'I Think He'll Be Great'

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The longtime host of The Biggest Loser is ready for her next chapter after leaving the show, and she dished about it to ET!

"I love new adventures," Sweeney said at the launch party for Gwen Stefani's Harajuku Lovers kids line in West Hollywood on Thursday. "I'm really proud that in my career I've always looked for pursuing my dreams. For me, it's been a year of doing that and certainly it's hard to say goodbye to Days of Our Lives as well as Biggest Loser. I'm looking for the next adventure and excited to share it with my fans."

WATCH: Alison Sweeney Leaves 'Biggest Loser' After 13 Seasons

Sweeney served as host of the NBC reality competition show for 13 seasons, having first joined in 2007 for season four. Earlier this month, trainer Bob Harper was announced as Sweeney's replacement.

After serving as a trainer on The Biggest Loser for more than a decade, Harper's new position will be a bit of a balancing act, as the show tells ET he will "offer his training expertise to contestants at various points throughout the season" in addition to hosting.

"I think he'll be great," Sweeney said. "I have no doubt."

WATCH: Trainer Bob Harper Replacing Alison Sweeney on 'Biggest Loser'

Despite leaving The Biggest Loser, Sweeney will have plenty to keep her busy. Her Hallmark Channel movie, Love on the Air, is set to air on Saturday, Sept. 26.

The film, also starring Jonathan Scarfe, finds Sweeney playing a radio host who moves to Chicago for her boyfriend and a new hosting job. The job quickly puts a strain on her relationship, and she starts falling for a rival shock jock (Scarfe) when they're forced to team up.

MORE: Jillian Michaels Reveals Why She Left The Biggest Loser

"I'm really thrilled and I'm proud of it," Sweeney said of the movie. "I was the executive producer as well as starring in it, so it was a big risk. It feels like my baby. I've worked so hard for years."

Sweeney also has a third novel, Opportunity Knocks, due out in April 2016.