Thekla Charlotte Knudtzon Brun-Lie (born 2 September 1992) is a Norwegian former biathlete.

She competed at the 2018 IBU Open European Championships in Italy, where she won a gold medal in Single mixed relay along with Vetle Sjåstad Christiansen.

[1] Her sister Celine Brun-Lie is an international cross-country skier.

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