
Douglas Reith is a British actor and teacher. He is best known for his role as Lord Merton in the television series Downton Abbey (2010–2015), as well as its two follow-up films. Reith was born in Melton, Suffolk. He studied acting at the Webber Douglas Academy of Dramatic Art. He began acting in the late 1970s, beginning with an appearance in International Velvet (1978) alongside Tatum O'Neal and Christopher Plummer. He worked as an announcer and presenter at BBC Radio 3 for five years before leaving to study Greats at Christ Church, Oxford for four years beginning in 1989. He worked as a teacher, including at Westminster School, before resuming his acting career. Reith joined the cast of Downton Abbey as Lord Merton in 2012, and alongside the cast was nominated for the Screen Actors Guild Award for Outstanding Performance by an Ensemble in a Drama Series at the 23rd Screen Actors Guild Awards. He reprised the role in the films Downton Abbey (2019) and Downton Abbey: A New Era (2022). In 2017, Reith was cast in Tim Burton's live-action remake Dumbo (2019). In 2019, he was cast in SAS: Red Notice (2021).

Outlander
TV • 2014

The Crown
TV • 2016

Minder
TV • 1979

Agatha Raisin
TV • 2016

Playhouse
TV • 1974

Downton Abbey
TV • 2010

Rumpole of the Bailey
TV • 1975

Pandora
TV • 2019

Professor T
TV • 2021

Rush
MOVIE • 2013

Rose and Maloney
TV • 2002

Downton Abbey: The Grand Finale
MOVIE • 2025

Ancient Rome: The Rise and Fall of an Empire
TV • 2006

Dumbo
MOVIE • 2019

Fearless
TV • 2017

Elizabeth I
TV • 2005

Elizabeth I
TV • 2005

Downton Abbey
MOVIE • 2019