[2][3][4] LeSueur grew up in Los Angeles, California and was raised a member of the Church of Jesus Christ of Latter-day Saints.
He served in World War II and attended the University of Southern California on the GI Bill.
[8] As a member of the New York literary and art scenes, LeSueur knew Andy Warhol and the two conspired to write a movie together.
[7] LeSueur's social circle is depicted in Wynn Chamberlain's diptych "Poets Dressed and Undressed," which shows LeSueur alongside O'Hara, Joe Brainard, and Frank Lima.
[3][7] He was a writer for several TV series, including Another World (1964), Texas (1980) and Ryan's Hope (1975).