Morrill's first television performance was on the Outer Limits episode "The Man with the Power" in 1963. She went on to guest star on numerous television series and television movies. Morrill had recurring roles on Family, Bret Maverick, Santa Barbara, and Newhart.
In addition to guest-starring roles, she also co-starred in two short-lived series: In the Beginning (TV series) starring McLean Stevenson, and Baby Makes Five starring Peter Scolari. Morrill made a guest appearance in MacGyver, in the season two episode "D.O.A.: MacGyver" as Helen Wilson. She made her last onscreen appearance on an episode of Coach in 1992. Jean Stapleton stated in an interview for the Archive of American Television that Morrill was the stand-in for her in the ninth-season episode of All in the Family, "A Girl Like Edith", in which Stapleton had a dual role.
On November 9, 1994, Morrill died of complications of a kidney infection at Cedars-Sinai Medical Center in Los Angeles at the age of 67. She was survived by her husband, Paul Bryson.
