Kelly Brook out-boobs Holly Willoughby in backstage Celeb Juice picture as she fills in for pregnant Fearne Cotton

When we heard that Kelly Brook was standing in for Fearne Cotton on Celebrity Juice whilst she's on maternity leave we thought: That's a helluva lot of boobies.

Kelly Brook tweeted this from backstage at Celebrity Juice today. Copyright [Instagram/KellyBrook]

Host Keith Lemon already has himself more than a handful with Miss Holly Willoughby (or Willoughbooby) - and to add Kels into the mix is just another level of cleavage.

And sure enough, curvy British model Kelly is vying for the boob trophy on the ITV1 show after she tweeted the very first picture from the set of the show.

Kels posted a behind-the-scenes snap of herself ahead of filming on the show on her Instagram page and captioned it: "On Set Rocking the Dolce! #CelebJuice"

The snap showed her posing into her eye phone in a VERY low cut floral Dolce & Gabbana designer dress, and she's definitely not shy about getting her boobs out.

Keith Lemon and Kelly Brook appeared in his film together last year. Copyright [Rex]

The 31-year-old model, who appeared alongside Keith Lemon is his movie last year, is joining the show as a team captain.

It will be her first major TV job since she did The Big Breakfast in 1999 and Celebrity Love Island in 2005.

Keith – real name Leigh Francis – already predicted that Kelly's chest would be a big feature of the show.

He said at the NTAs: “Doing Celebrity Juice is exciting – especially when you have a new captain who has bigger bangers than Fearne Cotton.

“I didn’t think we could replace Fearne but now we’ve got Kelly I hope Fearne don’t come back. Only joking – hope you have a smooth delivery Fearne. Miss you. Just hope Holly don’t get jealous.”

Kelly added: “I will have a lot of fun keeping Fearne’s seat warm until she returns.”

And this afternoon it seemed like Keith was settling down with his new-look panel. He tweeted:

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