Stephen Toussaint (born 22 March 1965) is a British actor and writer. He first gained prominence through his role in the ITV crime drama The Knock (1994–2000). He plays Lord Corlys Velaryon in the HBO fantasy series House of the Dragon.

His films include Shooting Dogs (2005) and Prince of Persia: The Sands of Time (2010). On television, he appeared in the second series of Line of Duty (2014), the ninth series of Lewis (2015), the Australian series Pine Gap (2018), and Small Axe: Red, White and Blue (2020).