Yasemin Kay Allen, born in 1989 in London, studied acting in Australia before moving to Turkey, where she completed her education at the Müjdat Gezen Conservatory Theater Department. She has appeared in numerous TV series such as Kavak Yelleri, Şeref Meselesi, and Muhteşem Yüzyıl. After spending some time living in Los Angeles and London, she starred in the American-British co-production Strike Back, portraying a Russian agent for two seasons. Upon returning to Turkey, she joined the TV series Olağan Şüpheliler on Exxen, followed by the launch project of Bein Connect, Erkek Severse. Allen also starred in The Turkish Detective, which aired on BBC Two. On the theater stage, she continues to perform in the play Büyük Aşıkların Sonuncusu.