Millard began acting on stage in Los Angeles when she was in the seventh grade.

[1] Millard left the Pasadena Players in July 1926 to go to Denver, where she had a one-year contract to perform with the Wilkes Stock Company.

[2] In 1928–29, Millard acted for six months with the Henry Duffy Players in the northwestern United States, after which she went to Los Angeles to co-star in The Hottentot.

[1] On Broadway, Millard portrayed Sybil Weyman in A Roman Servant (1934).

Her final film appearance was in a small role in Remains to Be Seen (1953), starring June Allyson and Van Johnson.