Sedef Avci (born 22 January 1982 ) is a Turkish model and actress. She won Elite Model Look Turkey in 1997. She represented Turkey at Miss Universe contestant in 2001. She is married to model and actor Kıvanç Kasabalı. She starred with Kıvanç Tatlıtuğ in the Turkish televesion series Menekşe İle Halil. She is also known for playing Bahar in the Turkish television series Ezel. Now she is playing in a series called Mazi Kalbimde Yaradır. Some fans also say she looks like the actress Özlem Yılmaz.