Her stage debut as an actress engaged at the theatre was in the role of Catherine in a 2002 production of David Auburn's 2000 play Proof.

Other notable stage appearances include roles in productions by authors and playwrights such as: Alexandre Dumas, Jaan Tätte, A. H. Tammsaare, William Butler Yeats, Luigi Pirandello, Carlo Gozzi, Jón Atli Jónasson, and J.

[5] Tamm made her film debut at age 15 in 1991 as Rita in the Roman Baskin directed drama Rahu tänav for Tallinnfilm, starring Mikk Mikiver and Jüri Järvet.

Following this role, she returned to her studies and didn't appear in another film until receiving a small roll in the 2002 Elmo Nüganen directed historical drama Nimed marmortahvlil, adapted from the 1936 Albert Kivikas novel of the same name about the 1918–1920 Estonian War of Independence.

[11] Tamm's first prominent television role as an actress was as Rita Leidpalu in the 2006–2007 ETV crime drama serial Ohtlik lend.