Nick Grimshaw has announced he is leaving the Radio 1 Breakfast Show, and will be replaced by Greg James.
The news was announced on the breakfast show on 31 May where James joined Grimshaw in the studio.
The 33-year-old is ending a near six-year stint on the show, and is now moving to James' 4-7pm slot on the station.
He began in 2012, taking over from Chris Moyles - a controversial decision for the BBC at the time - after previously presenting the station's late night programme.
Grimshaw said he had had the "time of his life" presenting the Breakfast Show but decided it was "time for a change and a new show".
"I'm so happy to be swapping shows with my friend and yours, Greg James, and can't wait to wake up to him each morning," he added. "Not literally. Just on the radio. Unless he's up for it."
James said: "It really doesn't get any bigger than this and I really want to build on the great work Grimmy has done".
He added: "the listeners have become like mates during the 10 years I've been on air, so to be there when they wake up is a real honour.
"They're always front and centre and this will of course be the case on the new breakfast show. It's going to be the most enjoyable challenge I've ever undertaken and I can't wait to get started."
The pair are set to begin their new shows on Radio 1 from September this year.
