Born to a Greek family, Tatiani was raised primarily in Germany. There, she attended a German high school and graduated in 1993. Tatiani learned acting during 1994 and 1998 and attended the Gaby-Singer-Dancing school in Stuttgart from 1979 to 1991. She got her first acting job on the German soap "Unter Uns", playing the taxi driver Jennifer Turner. Now, she's living in Berlin with her husband Oliver Petszokat and son Ilias. Tatiani likes dancing, inline-skating and snowboarding.