Michelle Williams would be interesting BUT she needs to actually gain a few whit was only that boney in late 90s shes always been skinny though.

Paula Patton needs to be in this she looks like Whit is an actual actress and can easily tan/lose weight. She has a look that can still portray a young whitney (20s)while also age and portray an older whitney (30s-40s). The subject of the movie alone will sell tickets you dont need a big name.