Sissy (Theodosia) Christidou (Thessaloniki, 12 September 1980) is a Greek presenter, journalist, actress and YouTuber.

In addition to being a presenter, she has also worked as an actress. Specifically, she made her debut on the big screen in 2008 with her participation in the romantic comedy "Molis Horisa" (dir. Vasilis Myrianthopoulos). In 2011, she participated as a voice actress in the animated film "The Smurfs" in the role of Smurfette. She also participated in the second part of the film, in the same role, in 2013.