Robert Charles Sproul is an American Calvinist theologian and pastor. He is the founder and chairman of Ligonier Ministries (named after the Ligonier Valley just outside of Pittsburgh, where the ministry started as a study center for college and seminary students) and can be heard daily on the Renewing Your Mind radio broadcast in the United States and internationally.

Sproul has been an ardent advocate of Calvinism in his many print, audio, and video publications, and he is also known for his advocacy of the Thomistic and Evidentialist approaches to Christian apologetics and his rejection of presuppositionalism. A dominant theme in many of Sproul's Renewing Your Mind lessons is the holiness and sovereignty of God. Sproul is a prolific author who has written more than 60 books and many articles for evangelical publications.