Adrian Justine Muhlach or AJ Muhlach (born May 20, 1992), is a Filipino pop singer, actor, and a member of the boy band XLR8. He starred in the Philippine television drama P.S. I Love You in 2011, and Bagets on TV5.
Muhlach was part of the P-pop group XLR8 which used to perform on Party Pilipinas in GMA Network.
Muhlach is the younger brother of actor Aga Muhlach, and the cousin of Niño Muhlach, also an actor. His father has Spanish-German ancestry. He is a member of the Iglesia ni Cristo.