Rubuta ci gaba don wannan sakin layi - Bayan mutuwar Sarkin Poland Augustus III a watan Oktoba 1763, an fara matsa lamba don zaɓen sabon sarki. Catherine ta ba da goyon bayanta ga Poniatowski. Rashawa sun kashe kimanin rubles miliyan 2.5 don taimakawa zabensa. Magoya bayan Poniatowski da abokan hamayyarsa sun shiga cikin wasu ayyukan soja har ma da ƙananan rikice-rikice. A ƙarshe, an tura sojojin Rasha kilomita kaɗan daga za ~ en za ~ en, wanda ya haɗu a Wola kusa da Warsaw. A cikin taron, babu wasu manyan masu fafatawa, kuma yayin kiran majalisa a ranar 7 ga Satumba, 1764
, Poniatowski mai shekaru 32 da haihuwa ya zama sarki, tare da kuri'u 5,584. Ya yi rantsuwa da pacta conventa a ranar 13 ga Nuwamba, kuma an yi nadin sarauta a Warsaw a ranar 25 ga Nuwamba. "Uncles" na sabon sarki a cikin "Family" da sun fi son wani dan uwansa a kan karagar mulki, Yarima Adam Kazimierz Czartoryski, wanda wani abokin zamaninsa ya bayyana a matsayin "débauché, si non dévoyé" (Faransanci: "mai lalata idan ba lalata ba"), amma Czartoryski ya ƙi neman ofis.