亚历山大·斯蒂芬·哈塞尔（Alexander Stephen Hassell，1980年9月7日-），英国演员。他是The Factory Theatre Company的联合创始人。Hassell出生于英国绍森德，是四个孩子中最小的一个，父亲是一名牧师。在埃塞克斯郡切姆斯福德的莫尔舍姆高中完成GCSE和A-Level课程后，他在中央演讲和戏剧学院接受培训。

他出演过许多舞台角色，最近一次是皇家莎士比亚剧团的《亨利四世》第一部和第二部中的哈尔，以及《亨利五世》中的亨利。他的第一个好莱坞角色是在乔治·克鲁尼的《郊区》（2017 年）中，同年晚些时候，他在 BBC 改编自杰西·伯顿的《微型画家》中出演了他的第一个主要电视角色，该剧于节礼日首次播出。他还在 Amazon Prime Video 的 The Boys （2019） 第一季中饰演 Translucent，并于 2021 年在 Netflix 的 Cowboy Bebop 中饰演 Vicious。

Alexander Stephen Hassell (born 7 September 1980) is an English actor. He is co-founder of The Factory Theatre Company. Hassell was born in Southend, England, the youngest of four, to a vicar. He trained at the Central School of Speech and Drama after completing GCSE and A-Level courses at Moulsham High School, in Chelmsford, Essex.

He has appeared in a number of stage roles, most recently as Hal in Henry IV Parts I and II, and Henry in Henry V, for the Royal Shakespeare Company. His first Hollywood role was in George Clooney's Suburbicon (2017), and later that year he appeared in his first major television role in the BBC adaptation of Jessie Burton's The Miniaturist, which first aired on Boxing Day. He also appeared as Translucent in the first season of The Boys (2019) on Amazon Prime Video, and played Vicious in Netflix's Cowboy Bebop in 2021.