But they're not going far - they'll help launch a new breakfast show on Monday 28 April on a new radio station called The Hits, which replaces Classic Hits.
The new format for The Hits will replace the existing Classic Hits model of having local breakfast shows for local areas. Instead, the Polly and Grant Show will air on Breakfast in 20 regions, nationwide on iHeartRadio, plus an hour of daily highlights will play from 6-7pm nationwide. The 9-3pm daytime shows will become local shows instead.
The Hits will capitalise on what's been successful for Classic Hits to date, with an injection of international entertainment star quality: the first interview booked for the brekky show is actor Matthew McConaughey.
The Radio Network (TRN) CEO Jane Hastings says the new format will deliver better entertainment for modern adult listeners, and is aimed at an audience of 30+.
TRN owns both ZM and The Hits.