Moyles made the announcement that he would be leaving the programme live on air this morning.
27-year-old Grimshaw is currently Radio 1's late-evening DJ from Monday to Thursday. In addition, he co-hosts the Sunday evening 10pm-to-midnight show with Annie Mac.
He is also a TV presenter on Channel 4's morning weekend show T4.
Grimshaw said today: "I'm super excited to be hosting the iconic Radio 1 Breakfast Show, it's been a dream of mine since the age of 11 and ...
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