Hayal Köseoğlu was born on December 20, 1992 in Istanbul. She completed her education at Istanbul Aydın University Faculty of Fine Arts, Department of Drama and Acting. Köseoğlu, who was introduced to acting at a young age, had her first acting experience at the age of 6 in the series Ruhsar on Kanal D. She also starred in the series Mahallenin Muhtarları and Aşk-ı Memnu on Kanal D, Muhteşem Yüzyıl and Arkadaşlar İyidir on Show TV, İstanbullu Gelin on Star TV, and Mucize Doktor and Hidden Truth on FOX.