<Li> Owen Vaccaro as Lewis Barnavelt, Jonathan's 10 - year old nephew . </Li> <Li> Kyle MacLachlan as Isaac Izard, an evil warlock </Li> <Li> Renée Elise Goldsberry as Selena Izard, Isaac's wife and a witch . </Li> <Li> Sunny Suljic as Tarby Corrigan, a classmate of Lewis . </Li>

The house with a clock on its walls wiki