Gemma Elizabeth Whelan (born 1981) is an English actress and comedian known for portraying Yara Greyjoy in the HBO fantasy-drama series Game of Thrones and as her stand-up character Chastity Butterworth.

[7] In 2014, she recorded a pilot chat show as her character Chastity Butterworth for BBC Radio 4,[8] which was in development in October 2015.

[12] She played Kate (appearing in all 18 main episodes, as well as three Christmas specials) in Ben Elton's BBC Two comedy Upstart Crow,[12] and was a series regular on The End of the F***ing World.

[12] In 2020, she portrayed Mrs Weston née Taylor in a film adaption of Jane Austen's Emma, directed by Autumn de Wilde.

[15] In February 2020, a stage adaptation of Upstart Crow opened at the Gielgud Theatre, London, Whelan reprising the role of Kate.