Timothy P. O'Malley is a Catholic theologian, author, speaker, and director of digital educational outreach at the McGrath Institute for Church Life at the University of Notre Dame. He also teaches on marriage and family, sacramental theology, and catechesis in the theology department at Notre Dame. He serves as a member of the executive planning committee for the 2022-2024 Eucharistic Revival and a theological consultant for the Committee on Laity, Marriage, Family Life, and Youth with the United States Conference of Catholic Bishops.

He earned his bachelor's degree in theology and philosophy and his master's degree in liturgical studies from Notre Dame. He earned a doctorate in theology and education at Boston College.

O'Malley is the author of several books, including Real Presence, the award-winning Off the Hook, Divine Blessing: Liturgical Formation in the RCIA, Bored Again Catholic, and Liturgy and the New Evangelization. His articles have appeared in publications including America magazine, Religion News Service, Aleteia, Catechist, and Our Sunday Visitor Newsweekly.

He lives with his family in the South Bend, Indiana, area.