Luke Dingle is the eldest son of Lilith Dingle.
Luke first visits Emmerdale in October 2004 for a Dingle family celebration to mark their 10th anniversary of living in the village. His mother Lilith then leaves Luke and his siblings to live with her cousin Marlon Dingle for a month. Luke returns in 2006 when Lilith leaves her children with Marlon and his wife Donna while she goes away to work. Days later Lilith is arrested for armed robbery. On his first day at Hotten Comprehensive School, Luke gets into a fight with Victoria Sugden after she makes a remark about his mother being in custody.
Marlon tells Social Services that he is having difficulties looking after them, so its agreed that they will go and stay with a foster family. They are soon informed that the children have gone missing, and are soon found in a nearby woodland. The following day they are taken into foster care. Marlon and Donna desperately try to get the children back but first have to find suitable accommodation. This finally happens when they buy Tall Trees Cottage, and the children move in with them on 5th July. However, the case against their mother collapses and on 13th July 2007 she takes them all to Ireland with her, much to Donna and Marlon's distress.