Leighton Thomas Keilen (born January 17, 2004) is the youngest child of Shaun and Tami Keilen and the younger brother of Haeley, Maile and Malia Keilen.

He was forgotten amid the chaos of controlling the girls. For example, Tami was so busy getting the three girls bathed and dressed in the morning, that she left Leighton in his highchair alone downstairs in the kitchen.

He was a year old at the time of his appearance on Supernanny and as of 2018, he is 14 years old.