Adam will co-host alongside Lindsey Russell, Richie Driss, Mwaka Mudenda, and Henry the dog.
The 20-year-old said he was “super excited” to get started on the long-running BBC children’s TV show.
In May, Mudenda was unveiled as the show’s latest presenter from her own home, due to lockdown restrictions.
“I am humbled and ecstatic to be part of such a legendary production,” said Beales, whose first show will air on this Thursday, September 3.
“It’s kind of weird – in a super exciting way – that the show I once watched when I was younger, is now the show I will be presenting along with the talented Lindsey, Richie, Mwaksy and of course, Henry.”
He added: “I can’t wait to get stuck in, even with the challenges they throw at me, though I am hoping none of them involve cheese – I hate cheese!”
Beales has appeared already on the CBBC panel show, The Dog Ate My Homework, but he rose to prominence via his own YouTube channel – which now has nearly three million subscribers.
It features his family, and finds him posting videos of pranks, challenges, DIY and life hacks.
“Adam really impressed us during his auditions, he’s a natural in front of the camera but he’s also very funny, incredibly warm, brilliant with kids and also perhaps a little bit mischievous which the Blue Peter audience will absolutely love,” said Blue Peter editor, Ellen Evans.
Broadcasters such as Konnie Huq, Radzi Chinyanganya and the late John Noakes have all previously hosted Blue Peter.
Blue Peter is live on CBBC every Thursday at 5.30 pm and is also available on BBC iPlayer.
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