It is reported that Winona Ryder is set to make a guest appearance on the end of season episode of TV sitcom 'Friends'. According to the report, the show's producers are worried that the upcoming wedding between Monica and Chandler might not be enough to woo audiences. Ryder is due to appear as a former college housemate who was once romantic with Rachel. It is understood that the episode will be titled "The One With Rachel's Big Kiss."