Yasemin Kay Allen (born 10 July 1989) is a British-Turkish actress.
Allen was born in London, one of two children of English father Dudley Allen and the English actress and singer Sonja Eady who, with her first marriage to Turkish actor Kayhan YñldñzoÃÂlu, had gained Turkish citizenship. When she was three months old, her family moved to Turkey. She went to Australia with her mother after she completed elementary school, where she took cinema, television, drama and Japanese courses and earned a scholarship from the University of Queensland. She returned to Turkey when she was 18, and, in 2008, graduated from Müjdat Gezen Konservatuarñ with degree in Theater Arts.
In 2008, Allen was cast in the leading role in the Turkish television series Elif. In 2010 she starred as Elena in the series Kavak Yelleri (the Turkish version of Dawson's Creek), and Juliette in the series Yerden Yüksek. In 2011 she played Pelin Akça in Hayat Devam Ediyor. In 2013 she played Irmak Tunalñ in the series Merhamet, then starred as Defne Sultan in the epic drama series Muhteà Âem Yüzyñl. In the same year she played the character Sibel in the gang drama series à Âeref Meselesi. That was followed by the series 46 Yok Olan, Fi, ðyi Günde Kötü Günde, Menajerimi Ara, The Usual Suspects, Erkek Severse, Dokuz OÃÂuz, The Last Day, The Turkish Detective, Bahar, To Love, To Lose and, as of 2026, continues with her long-time role in Back Streets.
In 2013, Yasemin Allen starred alongside Turkish singer ÃÂzcan Deniz in her film debut Su ve Ateà Â, playing the leading role YaÃÂmur Efe. That was followed by the 2016 romantic comedy Dönerse Senindir and the 2018 film Dorothy's Theory.
In 2008, Allen was a finalist in the L'Oréal' Face Competition and, in 2014, hosted the Elite Miss Turkey Beauty Contest. She appeared in commericals for Sprite, TTNET, and the shopping site N11.com.
In 2014, at the Turkey Elle Style Awards, Allen was nominated as Most Stylish Actress.
In 2026, Allen married former FBI agent Erdal Kaya.