Thomas John Ellis (born 17 November 1978) is a Welsh actor. He first became known for playing Gary Preston in the BBC One sitcom Miranda (2009–2015) before achieving wider recognition for his role as Lucifer Morningstar in the Foxurban fantasy series Lucifer (2016–2021), a role he reprised in the Arrowversefranchise’s “Crisis on Infinite Earths” crossover (2019).

Ellis’ breakout role was that of Gary Preston on the BBC One sitcom Miranda(2010–2015). He also appeared as King Cenred on the BBC fantasy series Merlin(2008), Justyn in Channel 4’s No Angels, and Thomas Milligan in the Doctor Whoepisode “Last of the Time Lords”. He has appeared in the BBC One soap opera EastEnders, the BBC sketch comedy show The Catherine Tate Show, and the BBC medical drama Holby City. In July and August 2009, he starred in the ITV comedy drama Monday Monday.He was cast as Detective Inspector Bland in Agatha Christie’s Poirot.

In February 2015, Ellis was cast as Lucifer Morningstar in the Fox series Lucifer, based on DC Comics’ publication and character of the same name, which premiered on 25 January 2016. The show later moved to Netflix. On 23 June 2020, it was announced that Netflix had renewed the show for a sixth and final season. He reprised the role of Lucifer during The CW’s The Flash episode of the Arrowverse crossover “Crisis on Infinite Earths”.

In 2021, Ellis won the Tell-Tale TV Award for Favorite Actor in a Cable or Streaming Sci-fi/Fantasy/Horror Series.[10] He starred as war correspondent Nick in the Netflix romantic comedy film Players (2024).