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Blue Peter editor Ellen Evans said she was excited for the show’s audience to meet the new presenter.
She said: “Shini is an exciting new talent, who impressed us with her adventurous spirit, sense of humour, determination and aspiration to have a positive impact on kids’ lives.”
The programme’s producers have revealed that Ms Muthukrishnan’s first challenge will involve taking part in aircraft aerobatics.
In her first live show, she will also be attempting to bathe Henry the dog and cook up a tasty treat.