- April-June 1998: Played Randall in "The Water Children" play by 'Wendy MacLeod' (Matrix Theatre, Los Angeles, CA.
- May-July 2000: Original cast member of "The Education of Randy Newman" at the South Coast Repertory Theater, Los Angeles.
- May 2006: Played "Watson" in "Little Egypt", a musical by Gregg Lee Henry and Lynn Siefert (Matrix Theatre, Los Angeles, CA). Also starring Sara Rue.
- Album: "You the One"
- Album: "Gregg Lee Henry II"
- Album: "Gregg Lee Henry"
- (1983) He acted in Truman Capote's play, "A Christmas Memory," in a Mark Taper Forum and the Sundays at the Itchey's Foot production in Los Angeles, California with Irene Tedrow in the cast.
- (May 23, 2017 - June 18, 2017) Public Theatre's Shakespeare In The Park production of "Julius Caesar". This was a controversial production since Caesar, as played by Gregg Henry, was made to look like the President of the United States, Donald Trump. Some people protested and some sponsors dropped out because of the plays depiction of the assassination of Caesar/Trump.