Sergey Galoyan (Russian: ru: Сергей Галоян, born December 25, 1981) is an ASCAP/PRS Award–winning songwriter/producer and DJ, born in Moscow. He is more commonly known as Sergio Galoyan and is of Armenian descent.

One of the creators of internationally known band t.A.T.u. also has written and produced their first four singles All The Things She Said, Not Gonna Get Us, 30 Minutes, and Show Me Love. He has also written and produced many other tracks for their first, second and third albums.