Miller moved frequently during her formative years due to her father's work as a pollution control specialist.
She studied history at the H. Sophie Newcomb Memorial College at Tulane University from 1971 to 1975, joining the Chi Omega sorority.
She returned with Gillian Spencer, who played Nina's mother, on April 20, 2010, for the tribute to Palmer Cortlandt (James Mitchell).
On February 2, 2017, Miller made a surprise appearance on the Hallmark Channel's Home & Family show, where she was reunited with a number of her former All My Children castmates.
After her two children went to college, Miller was inspired to make a career transition into the health and wellness field.