Guest Stars Emmett J. Scanlan as Kieran Aaron McCusker as Martin Hannah Adeogun as Ella Catherine McCormack as Claire Owen McDonnell as Sean Jonathan Forbes as James Yasmine Akram as Samara Jonny Holden as Patrick Annabel Mullion as Dr. Conlon India Mullen as Jen Joanne McNally as Wedding Coordinator Aaron Heffernan as Facilitator Eve Macklin as Sinead