Rugby star Luke Fitzgerald, politician Mary O'rourke and singer Callum Scott are among the line-up for this week's Saturday Night with Miriam.

Former Leinster and Ireland player Fitzgerald joins Miriam for his first broadcast interview since retiring to discuss what lead him to the difficult decision to quit the game and his plans for the future.

Irish model Roz Purcell (above) and her sister Rachel are in studio to chat about Rachel’s recent diagnosis with chronic myeloid leukaemia.

Mary O'Rourke drops by to discuss the rise of woman in politics and her upcoming book Letters of my Life.

And there will be music from singer-songwriter Calum Scott. As he climbs his way to the top of the British and Irish charts this week, Calum will perform his hit single Dancing on My Own.

Saturday Night with Miriam is on RTÉ One at 10.20pm on Saturday, july 23.