Franoszek was born in Berlin, West Germany to the fine artists Sabine Franek and Eduard Franoszek, who was also a professor at the Berlin University of the Arts. She graduated from high school (Abitur) in 1981.

Franoszek began working as a dancer, and also posed as a life model for German neo-expressionist painters Rainer Fetting, G.L. Gabriel and Salomé. In 1982 she played roles in two films, Domino (1982) by Thomas Brasch and Sei zärtlich, Pinguin [de] (English title: Be Gentle Penguin) (1982) by Peter Hajek [de].

Franoszek studied mime and dance in summer seminars at the University of Music and Performing Arts in Vienna and enrolled at the Free University of Berlin for Japanese Studies and Ethnology. In 1984 she was an exchange student with the Moscow Art Theater School and the Theater Academy Wachtangow in Leningrad, now: Saint Petersburg State Theatre Arts Academy. Franoszek earned a master’s degree in Performing Arts (BFA & MFA) from the Hochschule für Musik, Theater und Medien Hannover (HMTMH) in 1986, and began to work in regional and national theatre. She was a working finalist of the Actors Studio West in Los Angeles.

Franoszek is an experienced classical actress. She made her stage debut at the Niedersächsisches Staatstheater Hannover, the national theatre in Hanover, Germany in 1985. She performed a range of roles at various national theaters, including Allisen in Look Back in Anger, Honey in Who’s Afraid of Virginia Woolf?, Dunjascha in The Cherry Orchard, to Eve in The Broken Jug by Heinrich von Kleist and Lady Macbeth in Macbeth. She also played the lead role in the Russian plays, Time for Love, by Valentin Kataev and The Sarcophagus by Vladimir Gubarev, a play about the nuclear disaster in Chernobyl.

In 1999 Franoszek made her debut as a theater director at the Pacific Resident Theatre, Los Angeles with two Strindberg plays starring, among others, Orson Bean, Alley Mills and Paula Malcomson In 2006 she directed her first movie, the courtroom drama “Der große Videoschwindel” (a.k.a. “Spin Doctor”), starring Karoline Eichhorn, Nikki von Tempelhof and Justus von Dohnányi, which premiered in May 2007 and was invited to the International Cannes Film Festival (2007), German Film section.

In 2008 Franoszek made several guest appearances as Greta in Mad Men and in Illeana Douglas’s web series Easy to Assemble, and appeared in an episode of the TV series Children’s Hospital. Franoszek plays a recurring role in the second season of the award-winning German TV series The Weissensee Saga.

In 2014, Franoszek played the role of Frau Engel in the video game Wolfenstein: The New Order. She once again performed this role in the 2017 sequel.