Sam Buchanan is an English television and film actor. His television roles include Such Brave Girls (2023). His film roles include Back to Black (2024) and My Fault: London (2025). He is from Kent. He left college with a Performing Arts BTEC and then graduated with a BA from the ArtsEd Acting program in 2019. He had a role as Fitzy in EastEnders in May and June 2021, until the character became a victim of knife crime. He had a part in a not-for-profit verbatim production of the Grenfell Tower Inquiry, called Value Engineering which was filmed and broadcast on Channel 4 with the title Grenfell.

He had a role in 2022 video game Marvel's Midnight Suns. He had the role of Bash on 2023 video game Ten Dates. That year, he appeared as Billie's on/off boyfriend Nicky in Kat Sadler's British comedy drama series Such Brave Girls. He also appeared in Amazon Prime Video thriller series The Power.

In 2024, he could be seen as Nick Shymansky in the Amy Winehouse biopic Back to Black, the singer's early manager when she released her debut album, and a character who encouraged her to go to rehab. He appeared in HBO series Get Millie Black. That year, he featured in the second series of BBC One drama series Sherwood as Nicky Branson. In 2025, he appeared as Ronnie in the young adult romantic drama film My Fault: London