Frida Argento as Sara Eriksson, a scholarship non-boarding student and Simon's sister, who has social difficulty as a result of her Asperger's Syndrome and ADHD.Malte Gårdinger as August of Årnäs, second cousin of Wilhelm and Erik, third-year student, prefect and captain of the rowing team.

Omar Rudberg as Simon Eriksson, a rising star in Hillerska's choir, a scholarship and non-boarding student Sara's brother and Wilhelm's love interest.Edvin Ryding as Prince Wilhelm of Sweden, aka 'Wille' by fellow students.