Mandela: Long Walk to Freedom, Luther and The Wire star Idris Elba will be among Brendan O'Connor's guests on The Saturday Night Show on RTÉ One at 9:55pm.

Elba will be talking about portraying Nelson Mandela on screen, and why he still likes to DJ in Dublin venue Buck's Townhouse.

Fionnbar and Elma Walsh, the parents of the late inspirational teenager Donal Walsh, will discuss Fionnbar's new book about his son.

Another guest on the show will be solicitor and socialite Gerald Kean, who will discuss his near-death experience, setting a wedding date and his take on recent news stories.

Music on the night will come from Lake Street Dive and the finalists and winner of student fashion competition Junk Kouture will also be in studio.