BBC Radio 5 Live breakfast co-host Shelagh Fogarty is leaving the programme in the spring and will take over the lunchtime slot instead.
She's been on in the mornings with Nicky Campbell since 2004, but will replace Gabby Logan on the midday show when she leaves in 2011.
Gabby is leaving due to family and other work commitments ahead of 5 Live's move to Salford Quays.
Nicky and Shelagh won a Sony Gold for Best Breakfast Show last year, and this year helped 5 Live to the UK Station of the Year award.
She's been at the station since 1999 and formerly presented the weekend breakfast show, Drive, and Late Night Live.
Tweeting for the first time since January, Shelagh announced at 7.15 this morning: "Just to let you know I'm leaving Five Live Breakfast after 7 amazing years working with Nicky. Lunchtime Show from the Spring. Brekkie till then."
Nicky replied: Shelagh is a fantastic broadcaster, special person, and amazing friend. I will miss her so much as I know you will. The search is on!" He then added: "Feeling very sad. I will miss her so much but lunchtimes on 5 will be great and she has been getting up at 3.30am since 2004. Sleeeeeeep"
Speaking after the show about the new role, Shelagh said: "I'm in the lucky position of leaving a job I love to start one I'm really excited about. Nicky says he forgives me but I don't believe him! Hopefully he and I can still do programmes together in the future one way or another. I learnt a huge amount just by sitting next to him, and I'll miss him."
Radio 5 Live Controller Adrian Van Klaveren added: "Shelagh's done an outstanding job on breakfast for the last seven years, playing a pivotal role in helping the programme to win many awards including Sony Golds. Her on-air relationship with Nicky has been magical and it's not a partnership to be broken up lightly – but from next May she will be able to bring her own individual magic to lunchtimes and create a must-listen programme, presented at first from London but then of course from Salford by the end of next year."