Singer LeToya Luckett, formerly from Destiny's Child, will star as Dionne Warwick in a biopic of the R&B singer. The 75-year-old Warwick was in Cannes on Friday to announce the project, which will also co-star Lady Gaga, Danny Glover and Olympia Dukakis. The film, based on Warwick's memoir "My Life As I See It," will focus on the years 1962 through 1968. The five-time Grammy winner's hits include "Say a Little Prayer" and "That's What Friends Are For." AMBI Pictures will produce. "Dionne" is being shopped for buyers in Cannes.