Tómas Lemarquis is an Icelandic actor. He started his acting career in the early 2000s, debuting in his native Iceland. During this period, he mostly appeared in Icelandic films. In the 2010s, he pursued a career abroad, first appearing in the Indian Bengal feature Mushrooms. He next appeared in the films Errors of the Human Body and Insensibles. Later, he acted in the German movies Am Himmel der Tag and Frau Ella. In 2013, he played a notable role in the film Snowpiercer, after which he appeared in the American-French film 3 Days to Kill. More recently, he landed notable parts in X-Men: Apocalypse and Blade Runner 2049.