- Biskitts: Wiggle
- Capitol Critters: Berkeley
- The Gary Coleman Show: Angelica
- Smurfs: Princess Salvina
- Trollkins: Pixlee Trollsom, Deputroll Dolly
Darling started dancing at the age of 3 at the Gene Kelly Dance Studio. By the age of 6, she was performing in shows at the dance studio. At the age of 14, she appeared twice on the "Ted Mack & the Original Amateur Hour", after having started singing at the age of 13. As a teenager, Darling attended the Pittsburgh Playhouse School of Acting, then went on to Carnegie Mellon University where she graduated from the drama department. Upon graduation, she was a member of the original company of the American Conservatory Theatre (A.C.T.). She worked for several years with the Pittsburgh Playhouse, before moving on to the Washington Arena Stage in Washington, D.C. From there, to the Longwharf Repertory Company in Connecticut, before starring in Macbird at the Village Gate in New York City.
Darling had guest roles on The Bionic Woman (1976) and The Six Million Dollar Man (1974) as Peggy Callahan, and The New Adventures of Wonder Woman (1975) as Violet Louise Tree. In both roles, she played a simple but sweet secretary.
Besides television, Darling has appeared in movies and Broadway theater. She has also been credited as Kristen Tanner.