During the week The Late Late Show put a call out for Hozier's biggest fans, to be in the audience of Friday night's show when the Wicklow native will be live to sing and chat to Ryan.
The rest of the line-up has now been revealed and it's even more reason to be in the audience.
It includes comedian Reginald D Hunter, rugby pundit George Hook, Simon Weston and veteran reporter Valerie Cox.
George Hook will be on the show to chat about his concerns about the effect of rugby becoming an increasingly higher impact game in the wake of specialists at Tallaght Hospital identifying injuries in teenage players normally associated with violent trauma.
Veteran radio reporter Valerie Cox
, who announced her retirement during the week, will join Ryan to talk about her hugely successful broadcasting career and how a recent visit to the Greek island of Kos to cover the refugee crisis for a television documentary shook her to her core and convinced her that Ireland is shirking its responsibilities.
Reginald will be on the show to talk about making it big in America as stand-up and Simon Weston will talk about becoming an iconic symbol of the terrible impact of war after suffering severe burns to his face after his ship was bombed during the Falklands War.
