Ryan Oliver Sampson is an English actor, best known for playing Alex Venables in After You've Gone, Grumio in Plebs, and Tommo in Brassic. He also played Luke Rattigan in the Series 4 two-part story of Doctor Who, "The Sontaran Stratagem" and "The Poison Sky".

Plebs is a British sitcom broadcast on ITV2. It was first broadcast in March 2013, and was produced by Tom Basden, Caroline Leddy, Sam Leifer and Teddy Leifer. It stars Tom Rosenthal, Ryan Sampson, Joel Fry, and Jonathan Pointing, who play young residents of ancient Rome. The format has been compared to The Inbetweeners, Up Pompeii and Chelmsford 123. The first series, comprising six episodes, was broadcast between 25 March and 22 April 2013. Three subsequent series of eight episodes each were broadcast between 22 September and 3 November 2014, between 4 April and 16 May 2016, and between 9 April and 21 May 2018. A fifth series was commissioned with Rosenthal, Sampson and Pointing all returning. The fifth series started on 30 September 2019, ending on 11 November 2019. On 30 April 2020, it was confirmed the series would end with a feature-length special. Due to the COVID-19 pandemic, filming was delayed but eventually completed in May 2022.