Alexander Pappas is an Australian Christian musician and songwriter, best known for his work with the Hillsong Church in Sydney. He is a part of the Hillsong United band and Hillsong Young & Free, both of which are contemporary worship music groups associated with the church. Born and raised in Sydney, Australia, he began his music career at a young age, playing in church bands and eventually joining Hillsong United in 2008. He has since become a key member of the group, contributing to many of their most popular songs. In addition to his work with Hillsong United, Pappas is also a member of Hillsong Young & Free, a group that was formed in 2012 to reach out to a younger generation of worshippers. The group's music is a blend of contemporary Christian music and electronic dance music.

Pappas is known for his passionate and energetic performances, as well as his ability to connect with audiences through his music. He has toured extensively with both Hillsong United and Hillsong Young & Free, performing in countries all over the world. As a songwriter, Pappas has contributed to several successful albums. He has received recognition for his work, including nominations for the Dove Awards, which are presented annually by the Gospel Music Association in the United States.

Despite his success, Pappas remains committed to his faith and his church. He continues to serve as a worship leader at Hillsong Church, where he is involved in leading worship services and mentoring young musicians.