Amaryllis August (born Amaryllis April Maltha August in 2003) is a Danish actress and model. The daughter of filmmaker Bille August and actress Sara-Marie Maltha, she is a self-taught actress.

She began her acting career by securing the leading role of Laura in the drama series Families like Ours (En familj som vår, 2024), directed by Thomas Vinterberg. The same year, she portrayed Valentine de Villefort in the English-language television adaptation of the novel The Count of Monte Cristo.