[3] She began acting in teen roles, including the 1967 family series Barney Boomer, and 1969 television special Hey, Cinderella!

: Conspiracy to Kill (1971), Lock, Stock and Barrel (1971), The Bravos (1972), Women in Chains (1972), and The Devil's Daughter (1973).

I had a lot of brushes with accidents – landing gear collapsing on an airplane – so I added my middle initial and things have been better.

[5]Montgomery starred alongside Patrick Duffy in the short-lived NBC science fiction series Man from Atlantis from 1977 to 1978.

From 1989 to 1993, she starred as Katherine Howser, Doogie's mother, in the ABC medical comedy-drama series, Doogie Howser, M.D.. Montgomery also had a recurring role on Miami Vice, and has made over 80 guest appearances on television, including appearances on Ironside, T. J. Hooker, Dynasty, The Love Boat, Murder, She Wrote, L.A. Law, JAG, Mannix, Magnum, P.I., The Sixth Sense, The Virginian and Ghost Whisperer, among other series.