Alec R. Costandinos, (born Alexandre Kouyoumdjian in 1944 in Cairo, Egypt) is a French singer and artist of the 1970s. He was also intimately involved as a writer, publisher and musician in the development of Aphrodite's Child with Vangelis and Greek-born pop singer, Demis Roussos. On the disco front, he contributed to the debut album of Crystal Grass, which featured the club hit "Crystal World", released on the Philips label in France. Alec was also the publisher of hits for various artists including French chanteuse Dalida. He has also written under the pseudonym R. Rupen.

His father was Armenian and his mother was Greek.