Candace Cameron Bure has swapped glitz and glamor for pure "grit" after signing up for one of the hardest challenges she's "ever faced".

The Full House star is one of 15 famous faces taking part in season five of Special Forces: World's Toughest Test, which sees the celebrities deployed in Malaysia to "endure the world's toughest test in the most hostile environment a soldier could operate in... the jungle."

During their time on the show, the celebrities will have to tackle "harsh jungle warfare tasks", including searching an underground bunker and being suspected hundreds of feet up in the air.

Candace, 50, took to Instagram to share the news of her new gig with fans, posting a snap of herself in her jungle gear and writing alongside it: "No glitz, no glamor, all grit!! I said YES to one of the hardest challenges I've EVER faced!!"

The screen star will also have to face competition from her fellow celebrities, including Kate Hudson's actor brother Oliver Hudson, reality star Brandi Glanville, actress Ruby Rose, YouTube comedian Hannah Stocking and actor/singer David Charvet.

Selling Sunset's Breana Tiesi is also embarking on the challenge, and wrote on her Instagram page: "I still can't believe I did this - by far the worst / best thing I have ever endured."

One person commented on the post: "Omggg I feel like this is about to be sooooo good! Can't wait to watch!"

As another added: "I will be cheering and screaming for you through the television - proud of you babe."

The fourth season of Special Forces: World's Toughest Test was won by Olympic gold medallist Shawn Johnson East and The Real Housewives of New Jersey star Gia Giudice.

Speaking after the show aired, Shawn said previous contestants had given her some helpful advice to keep her motivated.

She told TV Insider: "We have a lot of friends who have been on the first three seasons. A lot of advice - it's only so transferable because every season's very different and you don't know what the challenges are going to be.

"But I think everyone said the same thing, which is just focus on getting to the next meal.

"Basically don't look at the bigger picture, just do little steps day by day."

Special Forces: World's Toughest Test premieres in September in the U.S.