An aspiring designer from the slums of Chicago puts herself through fashion school in the hopes of becoming one of the world's top designers. Her ambition leads her to Rome spurring a choice between the man she loves or her newfound success.

Diana Ross
as Mahogany

Billy Dee Williams
as Brian

Anthony Perkins
as Sean McAvoy

Marisa Mell
as Carlotta Gavina

Jean-Pierre Aumont
as Christian Rosetti

Nina Foch
as Miss Evans

Beah Richards
as Florence

Lenard Norris
as Wil

Bruce Vilanch
as Dress Manufacturer

Obelo
as Campaign Worker