The impact of American Idol is also strongly felt in musical theatre, where many of Idol alumni have forged successful careers. The striking effect of former American Idol contestants on Broadway has been noted and commented on. The casting of a popular Idol contestant can lead to significantly increased ticket sales. Other alumni have gone on to work in television and films, the most notable being Jennifer Hudson who, on the recommendation of the Idol vocal coach Debra Byrd, won a role in Dreamgirls and subsequently received an Academy Award for her performance.

Which American Idol contestant won an Oscar for Dreamgirls?