<Li> Kathryn Hahn as Ericka Van Helsing: The captain and cruise director of the cruise ship Legacy . She is secretly continuing her great - grandfather's wishes in eliminating monsters and is Dracula's love interest . </Li> <Li> Jim Gaffigan as Abraham Van Helsing: Ericka's great - grandfather who is a legendary monster hunter and Dracula's archenemy . </Li> <Li> Mel Brooks as Vlad: An ancient, more experienced and traditional vampire, who is Dracula's father, the grandfather of Mavis, the grandfather - in - law of Johnny, and the great - grandfather of Dennis . </Li> <Li> Asher Blinkoff as Dennis Loughran: Mavis and Johnny's 5 - year - old son who is a human / vampire hybrid, inheriting a combination of traits from his parents . He has a secret mutual crush on his best friend Winnie...but doesn't want to admit it yet . </Li>

Who voices the werewolf in hotel transylvania 3