[citation needed] The film Casanova Brown (1944) marked her screen debut at the age of 19 days.

The film led to her role again playing Paula Tracy alongside Thompson in the CBS television series, Daktari, (1966–69).

[3] During the summer of 1965, Walt Disney chose Miller as his own contractee, dubbing her "The Typical American Girl".

By early 1966, filming began for Daktari in Africa, U.S.A., a 200-acre ranch about 40 miles north of the Los Angeles metro area.

[4] Miller made many appearances in other television series, including Leave It to Beaver, Our Man Higgins, and The Donna Reed Show.