Portrait of an Actor (Italian: Ritratto di un attore; French: Portrait de Comédien; Russian: Портрет актера) is a painting by Domenico Fetti in the Hermitage Museum in Saint Petersburg, Russia. It was probably painted in 1621 or 1622 in Mantua, Italy. The sitter, who is holding a theatre mask, is believed to be a commedia dell'arte actor, either Tristano Martinelli or Francesco Andreini. There is a well known copy of the portrait by an unidentified artist in the Gallerie dell'Accademia in Venice.