Rev. Thomas Guthrie Franklin "Frank" Hill was Grace Livingston Hill's husband. They were married in 1892 by Grace's father and began their married life at the church that Frank was pastoring in western Pennsylvania. Later they were called to Wakefield Presbyterian Church near Philadelphia in Germantown, Pennsylvania. They had two daughters, Margaret Livingston Hill and Ruth Glover Hill.

Frank and Grace wrote a two-part series of books together, The Christian Endeavor Hour with Light for the Leader. This series was written for weekly Christian Endeavor youth programs and gave suggestions to its leaders for running the weekly meeting.

Frank was suddenly called Home in 1899 after suffering from acute appendicitis. Following his death, Grace moved to Swarthmore, Pennsylvania with her daughters to begin the next chapter of their lives.