Up until his last few days, he was appearing on Broadway in his son's critically acclaimed drama, "August: Osage County," a production of Chicago's Steppenwolf Theatre Company.
A college professor of literature and writing for most of his career at at Southeastern Oklahoma State University.
Received his bachelor's degree from Northeastern State University in Tahlequah, his master's degree from the University of Tulsa and his doctorate from the University of Illinois Urbana-Champaign. He was a Fulbright Scholar.
He was nominated for a 2007 Joseph Jefferson Award for Cameo Performance for "August: Osage County" at the Steppenwolf Theatre Company in Chicago, Illinois.
Memorial Service for Letts was held on February 28, 2008 at 1:00 pm at Mallett Funeral Home Chapel in Wagoner, Okla.
Parents were Hazel and Haskell Letts.
Graduated from Wagoner High School in 1952 in Oklahoma.
After graduation, he joined the Air Force, serving until 1956.