No, Austin Butler is not married. Austin does not also have a wife. He has never had one either.
Austin is however in a relationship. Kaia Gerber is the girlfriend of Austin Butler. They have been dating since 2021.
Kaia and Austin announced their relationship in December 2021. They have been together since.
Before Kaia, Austin was involved in two known past relationships.
He was rumored to have been engaged to his ex-girlfriend, Vanessa Hudges. The rumors were however false. Austin and Vanessa date from 2011 to 2020.