[3] Ahead of the 2009 season, the 16-year-old Hegerberg was promoted to the first-team squad and signed a professional contract with Kolbotn,[4] and subsequently made her debut in the Toppserien on 27 September 2009 during a 2–1 win against Fløya.

FFC Turbine Potsdam,[9] where she made her debut in the semifinal of the 2012–13 Frauen DFB-Pokal against Bayern Munich on 3 March 2013.

[5] She announced the move on her public Facebook profile, stating that she was no longer prepared to play for veteran coach Bernd Schröder.

Turbine's players issued an open letter in response, which expressed disappointment at the manner of Hegerberg's departure.

[11] It was announced in January 2018, that Hegerberg was joining Paris Saint-Germain ("PSG") in Division 1 Féminine on a transfer from Birmingham.

[12] In May 2019, it was announced Hegerberg had mutually agreed to leave PSG at the end of her contract and had already started negotiating with other teams.

[17] Nonetheless, Hegerberg did pick up a Coppa Italia winner's medal in May 2021 after her club defeated AC Milan on penalties in the final.