Gok Wan and Three Tenors singer José Carreras join the jam-packed line-up on tonight's Late Late Show.
Colin Farrell, Brian O'Driscoll and Steve Coogan have already been announced as guests on the show.
Speaking to RTÉ TEN this morning, Ryan Tubridy said: "Completing the stellar line-up show is style guru Gok Wan, who is going to tell us what not to wear and what not to eat.
"33 and 1/3% of The Three Tenors José Carreras is in studio for a chat and a song, bringing a bit of class to the proceedings. What an honour and a privilege."
Watch The Late Late Show tonight at 9.35pm on RTÉ One or watch it on the RTÉ Player.