Her Broadway credits include performing in musical productions of Gypsy, Carnival!, Guys and Dolls, They're Playing Our Song, Mr. President, and Cabaret.

Gillette's biggest exposure on a national scale came as a celebrity guest on various New York City-based game shows, mostly those produced by Goodson-Todman and Bob Stewart.

After the end of Search for Tomorrow in late 1986, and appearing with Robert Reed and Bert Convy on Super Password, Gillette transitioned to film with a variety of notable roles such as that of Mona in 1987's Moonstruck.

In the 1990s, Gillette starred in two Hallmark Hall of Fame movies, The Summer of Ben Tyler (1996) with James Woods and A Christmas Memory (1997) with Patty Duke.

Since 2010 she has had several guest-starring roles in such shows as: Law & Order: Special Victims Unit (2010), Shake it Up (2012), Modern Family (2013), Blue Bloods (2013), Elementary (2015), Public Morals (2015) and Chicago Med (2016).