[2] Because of his mother's position with the Ministry of Foreign Affairs, he spent part of his youth in the Netherlands and France and attended the Lycée La Fontaine in Paris.

Among his more notable roles were in productions of works by: A. H. Tammsaare, Peter Barnes, Aleksis Kivi, Neil Simon, Molière, Tom Stoppard, William Shakespeare, Ferenc Molnár, John Steinbeck, and Otfried Preußler.

[15] In February 2016, Kalmet appeared fully nude onstage in his monodrama Meeleheitlik katse pälvida festivalikutse at the Kanuti Guild Hall in Tallinn, and again in a photograph taken by Krõõt Tarkmeel in the March 2016 edition of the magazine Anne ja Stiil.

[17] In 2018, Kalmet had his first starring role in a feature film as Tõnu in the Rain Rannu directed comedy Ükssarvik, opposite actress Liisa Pulk.

[18][19] The following year, he appeared in the small role as a medic in his first foreign-language film, the Christopher Nolan directed American/British science fiction action feature Tenet.

In 2020, he had a starring role as Edvin in the Kaupo Kruusiauk directed psychological drama Sandra saab tööd, costarring Mari Abel.

The panel also included University of Tartu President of Student Body Katariina Sofia Päts and journalist Marii Karell.