Liina Tennosaar (born May 23, 1965) is an Estonian stage, film and television actress. Liina Tennosaar was born in Tallinn to Kalmer Tennosaar and Sirje Tennosaar (née Arbi).

She has one full sibling and one half-sibling, from her father's second marriage. Her father was a popular Estonian journalist, singer and television personality who is possibly best recalled as "Uncle Kalmer" (Estonian: onu Kalmer), the host of the ETV children's television series Entel-Tentel. Her mother was a stage, film and television actress.