Don Knotts had his big break as "Barney Fife" in The Andy Griffith Show, a 1960s sitcom for which he earned five Emmy awards. His roles after Three's Company were rather sporadic with several different guest appearances in movies and shows like Big Bully (1996) and Ghost World (2001). Knotts was in a total of three marriages, with his most recent with Frances Yarborough lasting from 2002 until his passing in 2006. He is survived by his son and daughter, Thomas and Karen Knotts.

"Larry Dallas" lives upstairs from the trio and is "Jack's" best friend. He is portrayed as a womanizing playboy, often lying to women about his occupation and using false names to get them into bed.

Richard Kline starred in both spin-off shows of Three's Company: The Ropers and Three's A Crowd. Kline was also part of the cast of the first national tour of the play Wicked back in February 2010. His most recent appearances include Love, Weddings & Other Disasters in 2020 and in Blue Bloods, where he has a recurring role.

"Janet Wood" was one of the trio's original roommates. She worked at a flower shop throughout the series, which could be seen all over the apartment. "Janet" was also the more reliable roommate in comparison to her somewhat dimwitted roommate "Chrissy."

Joyce DeWitt took a long break from acting after her role in Three's Company. She returned to show business in 1995, starring in the comedy film Spring Fling and lending her voice to a 1997 episode of Pinky and The Brain. DeWitt also hosted the 2003 NBC TV show Behind The Camera: The Unauthorized Story of Three's Company. She later narrated a documentary for her charity organization called Street Signs: Homeless But Not Hopeless in 2018, and most recently acted in the 2019 film Savant.

"Jack Tripper" is a Santa Monica native and a former member of the United States Navy. During his search for a new place to stay, he stumbles upon "Janet Wood" and "Chrissy Snow's" apartment and quickly moves in with the two after the ladies convince their landlord "Stanley Roper" that "Jack" is gay, although this isn't true.

John Ritter became somewhat of a TV legend later on in his career. He was nominated for several awards four years in a row for his performance in the children's animated series Clifford The Big Red Dog (2001-2004). Ritter also won an Emmy Award for his role in Three's Company back in 1984 for Best Leading Actor as well as a Golden Globe. Last but not least, Ritter won a People's Choice Award for his role in Hooperman for Favorite Male Performer in 1988. He became ill during the production of 8 Simple Rules For Dating My Teenage Daughter in 2003 and passed away on September 11th of that year.

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