She began her career as a child actress in 1960 when she played Little Bo Peep in the Disney film "Babes in Toyland". Jillian appeared as Dainty June in the Rosalind Russell-Natalie Wood movie version of "Gypsy" (1962). She had several television appearances in the 1960s and 1970s, notably becoming a regular on the 1960s sitcom "Hazel" (1965-66 season) and appearing in the 1963 "Twilight Zone" episode "Mute" (where she was given screen credit as "Ann Jilliann") as the mute telepathic Ilse Nielson. In 1983, Jillian was honored by the Young Artist Foundation with its Former Child Star "Lifetime Achievement" Award recognizing her achievements within the entertainment industry as a child actress.