Heitz had a variety of roles during her career. Many cited her work as the character Lillian Adler in the Fox musical dramedy Glee, though she only appeared twice — in the pilot and as an image in a trophy case. She was a former head of the glee club at McKinley High, according to her backstory.
Among her other television credits were appearances on The Big Bang Theory, Shameless, Grey’s Anatomy, ER, Monk, Prison Break, CSI: Crime Scene Investigation, Without a Trace and Early Edition.
In film, Galloway Heitz starred with Richard Farnsworth and Sissy Spacek in David Lynch’s 1999 The Straight Story and played a nurse opposite Lindsey Lohan in the 2007 thriller I Know Who Killed Me. Her other credits included the film Just Visiting with Jean Reno and Christina Applegate,