[2] Born in Paris,[3] Bellugi is the daughter of Italian actor Duccio Bellugi-Vannuccini, while her mother is a Danish costume designer.

[6] She left to pursue a degree in international relations at Roskilde University from 2016 to 2019,[6] in between which she filmed The Invisible Boy: Second Generation (2018), The Apparition (2018) and Golden Youth (2019).

[11] In 2018, she starred opposite Vincent Lindon in Xavier Giannoli's The Apparition, in which she plays a young girl named Anna who develops a cult following after claiming to have seen an apparition of the Virgin Mary in a remote village in southern France, and is investigated by a journalist played by Lindon who is tasked by the Vatican to determine her authenticity.

[14] In 2019, she starred in Eva Ionesco's Golden Youth as a young teenager who is drawn into a lavish nightlife by a wealthy older couple, portrayed by Isabelle Huppert and Melvil Poupaud.

[1][17][18] In 2023, she starred in Junkyard Dog by Jean-Baptiste Durand,[19] La Fille d'Albino Rodrigue by Christine Dory,[20] and The Taste of Things by Trần Anh Hùng.