Ally Rehmtullah (born 18 January 1986) is a Tanzanian fashion designer.
He is a fourth generation Tanzanian of Indian descent, who studied at Baum School of Art and Lehigh Valley College in the United States, before moving back to Tanzania to work as a teacher of graphic arts while gradually shifting his career to fashion design. In September 2008, he became the first East African designer to show at London Fashion Week.