Il pastor fido ("The Faithful Shepherd") (HWV 8) is an opera seria in three acts by George Frideric Handel. It was set to a libretto by Giacomo Rossi based on the famed and widely familiar pastoral poem of the 'Il pastor fido' by Giovanni Battista Guarini. It had its first performance on 22 November 1712 at the Queen's Theatre in the Haymarket, London.