Young joined the cast of Grease last September and played the role on Kenickie during the final four months of the popular musical's Broadway revival, which ended earlier this year. Fisher played the role of preppy Patty Simcox during the revival.
Neither Young nor Fisher is currently starring in Grease's national tour -- which does include Idol fifth-season champ Taylor Hicks starring as Teen Angel.
Young finished in seventh place on Idol's fifth season and released his self-titled debut album last July.
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