Alec Rupen Costandinos, (born Alexandre Garbis Sarkis Kouyoumdjian in 1944 in Cairo, Egypt) is a French composer, music producer, songwriter and singer of the 1970s, known for his contributions to disco music. His father was Armenian and his mother was Greek. Costandinos dominated the disco and Euro-disco genres in the late 1970s. He began his career as a publisher and producer for various artists, including French pop star Claude Francois and chanteuse Dalida. After writing Cerrone's "Love in C Minor" (1976), Costandinos was signed to Barclay Records. He released his first album, Love & Kisses in 1977, which featured the hit track "I Found Love (Now That I Found You)". Costandinos went on to release a number of wildly successful records under the prominent American disco label, Casablanca. His album, Romeo & Juliet has been credited for bringing the concept album to dance music. He also wrote "Thank God It's Friday", the theme track to the disco film by the same name.