She began her career as a singer in nightclubs and performed in musicals off-Broadway before making her television debut in the CBS daytime soap opera, As the World Turns (1975–1976).

[4] Noone has made her screen debut playing Margaret Porter in the CBS daytime soap opera As the World Turns from 1975 to 1976.

In 1977, she was cast as recently divorced Ellen Shepherd on the ABC daytime soap opera, All My Children, a role she played from 1977 to 1989.

After guest starring roles on Quantum Leap and Empty Nest, in 1990 Noone, was asked to play the new character of Claudia Whittaker, elder sister of Greg Sumner (William Devane) in the CBS primetime drama Knots Landing.

In 1992, Noone received Soap Opera Digest Award nomination for Outstanding Actress: Prime Time for her performance as Claudia.

In 1997, Noone returned to daytime television playing gossip columnist Bette Katzenkazrahi on the NBC series Sunset Beach, produced by Aaron Spelling.

[7] The series aired only three years, Noone signed a new contract with the serial in August 1999, she also incorrectly predicted that Sunset Beach would not be axed by NBC.