Cecily Wellesley-Smith

Arsenal Wellesley-Smith also spent much of the 2024–25 campaign with Arsenal, who signed her to a dual-registration agreement that also allowed her to compete for the Arsenal Women's Academy Under-21 side. On 24 June 2025, Arsenal announced that they had signed Wellesley-Smith to her first professional contract.

Leicester City (loan) In September 2025, the club sent her on a loan spell through the 2025–26 season to fellow Women's Super League club Leicester City. Later that month, Wellesley-Smith made her Leicester City debut, participating in a 5–1 Women's League Cup victory over Ipswich Town. She would go on to struggle to earn playing time with Leicester, failing to earn any further appearances following her debut. In January 2026, Wellesley-Smith was recalled to Arsenal after only completing half of the original loan agreement.

FC Rosengård (loan) On 2 February 2026, Wellesley-Smith was announced to have joined Swedish Damallsvenskan club FC Rosengård through the end of the 2026 Damallsvenskan. She made her club debut twelve days later, earning the starting nod in a Svenska Cupen match against Vittsjö GIK to kick off Rosengård's season. On 17 March 2026, she scored her first Rosengård goal, heading in the final goal in a 3–0 victory over Växjö DFF to close out Rosengård's Svenska Cupen campaign with a win.

International career Wellesley-Smith has represented England at multiple youth international levels. In November 2022, she captained the under-16 team in a friendly match against Wales. In 2024, she was a member of the under-17 squad that finished the 2024 UEFA Women's Under-17 Championship as runners-up after losing to Spain in the final. She was named to the Team of the Tournament alongside England teammates Lola Brown and Nelly Las. Wellesley-Smith has also been capped at the under-19 and under-20 levels.