Aiden Jennings is a fictional character on the NBC soap opera Days of Our Lives portrayed by Daniel Cosgrove from 2014-15, when the character was supposedly killed off. In 2016, it was announced that Daniel Cosgrove would once again return to the series as Aiden. Cosgrove made his return on May 9th 2016 as an alive Aiden Jennings. Cosgrove made his final appearance on October 25, 2016 when he once again leaves the soap.