[2] In 1993, she received the Ants Lauter Award [et] for her portrayal of the character Josie Hogan in a Priit Pedajas staged production of Eugene O'Neill's A Moon for the Misbegotten (Estonian translated title: Saatuse heidikute kuu) at the Endla Theatre.
In 2004, she appeared in the feature-length television film Taksirengit, directed by Jussi Niilekselä and based on a play by Mihkel Ulman.
She has made appearances on such Estonian television series as Urpo & Turpo,[5] Ohtlik lend, Ühikarotid, Kelgukoerad, Kättemaksukontor, Elu keset linna and Viimane võmm.
[8] Tennosaar made her feature film debut in 1990 in a starring role as Juuli in the Arvo Kruusement directed Sügis for Tallinnfilm.
[9] In 2007, she appeared in a small role in the Veiko Õunpuu directed drama Sügisball; adapted from author Mati Unt's 1979 novel of the same name.
That same year she appeared as Viire in the Andres Maimik and Rain Tolk directed road movie comedy Jan Uuspõld läheb Tartusse; a film that portrays Estonian actor Jan Uuspõld as a down-on-his-luck caricature of himself trying to hitchhike from Tallinn to Tartu to perform in a role at the Vanemuine theatre.