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Susan Michaela Sullivan is an American actress and voice actress, who is known for several notable roles on various television programs.

From 2009 to 2016, she appeared in ABC's Castle as the title character's mother, Martha Rodgers.

Sullivan played the role of Lenore Curtin Delaney in the daytime soap opera, Another World (1971–1976), Maggie Gioberti Channing in the popular 1980s soap opera, Falcon Crest (1981–1989), Kathleen Rachowski in The George Carlin Show, and Kitty Montgomery in the popular 1990s sitcom Dharma and Greg (1997–2002).

For Disney, she voiced Mrs. Frederickson in Big Hero 6: The Series. She also played Victoria Murray in The Real O'Neals.

Early career[]

Sullivan was born in New York City, but was raised in the Long Island area of Freeport, Nassau County, New York, where she graduated from Freeport High School in 1960.

She earned a BA from Hofstra University in drama in 1964, During her later years in college, she worked as a Playboy Bunny. In 1960, she got her first acting job in a Broadway play, Jimmy Shine, with Dustin Hoffman. She got a contract with Universal Studios in 1969.

Disney Role[]


  • Sullivan is currently the only cast member of Castle to not have a Twitter account as of yet, until June 25, 2015, when she started a Twitter account.
  • She was married twice and she is the mother of two sons.
  • She has two siblings, a brother named Brendan Sullivan and a sister named Brigid Sullivan.
  • She is in a relationship with noted psychologist and author Dr. Connell Cowan.
  • She played Dr. Elaina Marks in the pilot of The Incredible Hulk 1978 TV series. Footage from this episode was re-used in the Castle episode "Tick, Tick, Tick...", where it was implied that the part was played by Sullivan's character, Martha Rodgers.