Seda Sayan (born Aysel Gürsaçer; 30 December 1962) is a Turkish pop folk singer, actress, and TV variety-show hostess.

Sayan was born in a poor family so she started working from a very young age. She started performing at the age of 16. She had her date of birth changed via a court decision in 1978 to 4 January 1959, in order to be eligible for performing at a specific venue. In December 2017, she changed her date of birth back to 1962. Her big shot came in 1984 when she played a role in a movie opposite Kadir İnanır.

In 1987, she married Rıdvan Kılıç, a soccer player. The marriage did not last long and they divorced a few months later. She met Sinan Engin in 1989 and they later got married. They had their son Oğulcan Engin in 1990, but the couple divorced in 1995. Sayan was then in a relationship with Mahsun Kırmızıgül, a famous singer, for three years. In 2014, she was sentenced to a 5-year probation and a judicial fine of 6,000 liras for insulting Ankaralı Turgut.On 24 April 2022, she married musician Çağlar Ökten.