Hudson won an Academy Award for her role in the movie "Dreamgirls." Rahman won two for music in "Slumdog Millionaire," including the Best Original Song award for "Jai Ho."
Also performing: Kurt Elling, a Grammy-winning jazz singer and composer, and the National Symphony Orchestra, with Marvin Hamlisch conducting.
The dinner for Indian Prime Minister Manmohan Singh will be in a tent on the White House South Lawn. Guests will dine at tables for 10 with apple-green linens. Deep purple flowers are meant to evoke the state bird of India, the peacock.