Thea Lambrechts Vaulen (born in 1994 in Solund) is a Norwegian actress. Graduating with a degree in acting from the Oslo National Academy of the Arts (Kunsthøgskolen i Oslo) in 2019, she began her stage career at the Teatret Vårt company in Molde, before joining the touring Riksteatret for a production of Peer Gynt. She has since performed regularly at the Norwegian Theatre (Det Norske Teatret) in Oslo, notably playing the title role of Ronja in the adaptation of Ronja, the Robber's Daughter (Ronja Røvardotter, 2023). Her stage performance in the play Tid for glede earned her a Hedda Award nomination for Best Supporting Actress for the 2021/2022 season. In cinema, she gained recognition portraying Milly Thaulow in Henrik Martin Dahlsbakken's biographical film Munch (2023). She subsequently played Sunna in the psychological drama Armand (2024), directed by Halfdan Ullmann Tøndel, which premiered at the Cannes Film Festival in the Un Certain Regard section.