is an Irish actor. Known for his roles on stage and screen, he has received numerous accolades, including a BAFTA Television Award and two Laurence Olivier Awards, along with nominations for a Primetime Emmy Award and two Golden Globe Awards.

Scott came to prominence portraying James Moriarty in the BBC series Sherlock (2010–2017), for which he won the BAFTA Television Award for Best Supporting Actor. His role as the priest on the second series of Fleabag (2019) earned him the Critics' Choice Television Award for Best Supporting Actor in a Comedy Series. He is also known for his roles in the films Pride (2014), Spectre (2015), and 1917 (2019). He was nominated for a Golden Globe Award for Best Actor for his starring role in the romantic drama film All of Us Strangers (2023).

On stage, Scott earned praise for playing the lead role of Garry Essendine in a 2019 production of Present Laughter at The Old Vic, for which he won the Laurence Olivier Award for Best Actor. He also won the Laurence Olivier Award for Outstanding Achievement in an Affiliate Theatre in 2005 for his role in A Girl in a Car with a Man at the Royal Court Theatre.