Hadley Fraser (born Robert Hugh Fraser on 21 April 1980) is an English stage actor. He made his critically acclaimed West End debut as Marius in Les Misérables. He also originated the role of Tiernan in the Broadway show The Pirate Queen.

Fraser is the son of Jack and Carol Fraser, and brother of Ed Fraser, an officer in the British Army. He holds a BA from Birmingham University and a Postgraduate Diploma from the Royal Academy of Music. In 2011 he was made an Associate of the Royal Academy of Music, or ARAM.

His West End and other British credits include Les Misérables, Assassins, The Far Pavilions, The Shaughraun, and Pacific Overtures. He played Gareth in the Doctor Who episode