Robert Hugh "Hadley" Fraser is an English actor and singer. He made his West End debut as Marius Pontmercy in Les Misérables. He also originated the role of Tiernan in the Broadway show The Pirate Queen.

Marius Pontmercy is a fictional character, one of the protagonists of Victor Hugo’s 1862 novel Les Misérables. He is a young student, and the suitor of Cosette. Believing Cosette lost to him, and determined to die, he joins the revolutionary association Friends of the ABC, which he associates with, but is not a part of, as they take part in the 1832 June Rebellion. Facing death in the fight, his life is saved by Jean Valjean, and he subsequently weds Cosette, a young woman whom Valjean had raised as his own.