George Clooney was on Roseanne?
Yep, before they collected Oscars and became Hollywood's A-list, many of today's biggest celebs appeared as guest stars on the popular ABC sitcom. From Bruce Willis to even Leonardo DiCaprio, see all the biggest stars who took a trip to Lanford, IL.
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Click through the gallery to see the famous faces on Roseanne.
Before E.R. and Ocean's Eleven, the 55-year-old played Roseanne's "hot" boss Booker Brooks in 11 episodes of the show.