Leah Cathrine Williamson is an English professional footballer who plays for Women's Super League club Arsenal and captains the England women's national team. A versatile player, she plays in central defence or the midfield. She has spent her entire senior domestic career at Arsenal. She also represented Great Britain at the Olympics in 2021. Williamson captained England to their first UEFA European Championship victory, and the women's team's first international title, in 2022, for which she was named in the Team of the Tournament.

Arsenal Women Football Club, commonly referred to as just Arsenal, is an English professional women's football club based in Islington, London, England. The club plays in the Women's Super League, the top tier of English women's football. Arsenal were founded in 1987 following an initiative by Vic Akers, who became the club's first, longest-serving, and most successful manager. He guided Arsenal to continued success until his departure in 2009, winning the most top-flight matches in English football history. The club have sustained this record, and have won the most doubles and trebles in English football history. Arsenal have also completed a record seven unbeaten league seasons, setting a number of English records for longest top-flight unbeaten run, for goals scored, and points won.