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| John Ritter as Jack Tripper (1977-1984) |
| Joyce DeWitt as Janet Wood (1977-1984) |
| Suzanne Somers as Christmas "Chrissy" Snow (1977-1981) |
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| Norman Fell as Stanley Roper Audra Lindley as Helen Roper (1977-1979) |
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| Ann Wedgeworth as Lana Shields (1979) |
| Here is the cast of Three's Company, along with the years they appeared on the show. |
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| Don Knotts as Ralph Furley (1979-1984) |
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| Richard Kline as Larry Dallas (1977-1984) |
| Jenilee Harrison as Cindy Snow (1980-1982) |
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| Priscilla Barnes as Terri Alden (1981-1984) |