 Mamontovas has also written soundtracks for several short films, and music for the theater play "Ivanov" by Anton Chekhov (directed by Nekrošius) at Teatro Argentina in Rome.Mamontovas' music had a profound influence in Lithuania.Having acted in videos and small scale movies, Andrius was invited to act a main role in "Hamlet", directed by Eimuntas Nekrošius.