Kaja Kallas's first cabinet was the Cabinet of Estonia between 26 January 2021 and 14 July 2022. It was a grand coalition cabinet of the Reform Party and the Centre Party until 3 June 2022 when Kallas dismissed Centre Party ministers from government after several weeks of disputes between the two parties.

The Estonian Reform Party is a liberal political party in Estonia. The party has been led by Kaja Kallas since 2018. It is colloquially known as the "Squirrel Party", referencing its logo.