His acting career in Russia began with the film Brother 2. In the film, he played the twin brothers Dmitry and Konstantin Gromov. He was cast in a number of Russian films and serials. From his youth Dyachenko has also been a musician; composing, arranging and performing on the guitar and singing. He has recorded some of his songs in a Chicago studio with well-known Musicians. In 2012, Alexander, together with Drummer Boris Lifschits, created a musical project Antigo.
