Blake Keenan Harrison is an English actor. He is best known for his role as Neil Sutherland in the BAFTA-winning comedy series The Inbetweeners on E4, and as 'Medium' Dan in the ITV sitcom Kate & Koji. Harrison appeared in three seasons and two subsequent films of the award-winning comedy The Inbetweeners. Other television work for Harrison includes the BBC Three comedies Way to Go and Him & Her, as well as the Comedy Central series Big Bad World, The Bleak Old Shop of Stuff and The Bill. Harrison also appeared in all three seasons of The Increasingly Poor Decisions of Todd Margaret, created by David Cross. His theatre work includes The End of the Pier at the Park Theatre in 2018, Step 9 of 12 at the Trafalgar Studios, London, in 2012, and Random Lives of Memories at the White Bear Theatre.

His filmography includes Keeping Calm with Maxine Peake, Stanislavski's Method Madness and The Rubies Reunion with Timothy Spall; he also appeared in the short film Her Eyes Met Mine from Slightly Ajar Productions. In 2014 he played Alfie in the ITV sitcom Edge of Heaven. Harrison also voiced Scoop in the British and American versions of the 2015 reboot of the British children's television series Bob the Builder. He played Private Pike in the 2016 remake of Dad's Army. In 2018 he directed the award-winning short film Hooves of Clay, in which he also starred alongside Rebecca Humphries. He later played Andrew Newton in A Very English Scandal. In 2020 he was cast as 'Medium' Dan in the ITV sitcom Kate & Koji.