Liina Omaru's first significant television appearances came in 1995 as the character Virve in the
Eesti Televisioon (ETV) dramatic television series
Wikmani poised, based on the 1988
novel of the same name penned by Estonian author
Jaan Kross. In 2007, she appeared in the role of Piret on the Swedish crime drama television series
Tusenbröder; the previous year she had played the same character in the Erik Leijonborg directed feature film adaptation of the series titled
Tusenbröder - Återkomsten. Also in 2007, she made an appearance on the ETV crime drama series
Ohtlik lend as the character Anne Kulik. In 2008, she played the role of Elfriede Kallaste in nine episodes of the ETV historical drama television mini-series
Tuulepealne maa, which was a twelve-part mini-series chronicling the early 20th-century history of Estonia; its birth as a country, the
Estonian War of Independence, post-war life throughout 1920 up to 1941 and
World War II. Other television appearances include a small role as Barbi on the
Kanal 2 drama series
Pilvede all in 2010; and as Ireen in
Klass - Elu pärast, which was a 2010 television mini-series follow-up to
Klass, the
Ilmar Raag directed 2007 feature film about school bullying and violence. Liina Olmaru has also appeared in a number of memorable radio theatre plays, including the role of Enenken Üüve in
Ekke Moor in 2002, as Virve Adamson in
Madis Kõiv's
Üks teine lugu in 2003, and as Linda Vilde in Heidi Sarapuu's
Tervist, härra Vilde! in 2015. ==Film==