Alexis Collera Castro (born September 27, 1985), better known as Alex Castro, is a Filipino model, singer, actor and politician currently serving as the Vice Governor of Bulacan since 2022. He is previously a member of the Bulacan Provincial Board from the 4th district from 2016 to 2022. He also served as a municipal councilor of Marilao from 2007 to 2013 and chairman of Sangguniang Kabataan in Barangay Lias, Marilao from 2002 to 2007. As a talent, he signed with GMA Network, yet later transferred to its rival network ABS-CBN, then returned to GMA after eleven years.