John Brennan and Francis Brennan join Oliver in studio as they reach the TV milestone of their 100th episode of 'At Your Service' 

<p>John Brennan and Francis Brennan join Oliver in studio as they reach the TV milestone of their 100th episode of 'At Your Service'&nbsp;</p>

Oliver Callan charms the nation with the best of entertainment, trending topics, sports, the arts and everything in between - all with a touch of craic.

<p>Oliver Callan charms the nation with the best of entertainment, trending topics, sports, the arts and everything in between - all with a touch of craic.</p>

Oliver Callan charms the mood of the nation, discusses trending topics, the latest in sport, the arts and everything that's hopping in Irish life! Listen live Monday to Friday at 9am on RTÉ Radio 1.