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Actors You Definitely Forgot Were 'SNL' Cast Members, Including Robert Downey Jr.

From controversial 'SNL' sketches to famous quotes ("More cowbell!"), Saturday Night Live has produced its share of memorable live TV moments in the years since it first aired in 1975. The tenures of some of its cast members, however, haven't remained so vivid in our memories. For some, their time on the show lasted only one season (or less). For others, later successes overshadowed their SNL runs. For many, it was both. Read on to see 20 former cast members you may have forgotten ever graced the SNL stage.