The main protagonists of the film are Katya (Varvara Popova), the daughter of a factory worker and Andrey (Ivan Koval-Samborsky), the son of the former owner of the factory who illegally returns to the USSR to find treasures hidden by his father. The film title refers to the Communist party's appeal, after Lenin's death, to enlarge its membership.
| Actor | Role |
|---|---|
 Varvara PopovaKatya Sushkova | Katya Sushkova |
| NNatasha KonyusKatya in the childhood | Katya in the childhood |
 Mariya Blyumental-TamarinaKatya's grandmother | Katya's grandmother |
 Ivan Koval-SamborskiyAndrey, factory worker | Andrey, factory worker |
 Olga ZhiznevaLulu | Lulu |
 Anatoli KtorovVladimir Zaglobin, cynical emigrant | Vladimir Zaglobin, cynical emigrant |
 Vera MaretskayaVarya | Varya |
 Alexander GeirotCandidate for the throne | Candidate for the throne |
 Mikhail ZharovFactory worker | Factory worker |
 Tatyana MukhinaLittle girl | Little girl |
 Nikolai ProzorovskyFactory worker | Factory worker |
| VVladimir Yermolov-BorozdinPyotr Zaglobin, former manufacturer | Pyotr Zaglobin, former manufacturer |
 Yakov RykovYevstigneich, kulak | Yevstigneich, kulak |
| NNikolai Gladkov(uncredited) | (uncredited) |
 Naum RogozhinEmigrant (uncredited) | Emigrant (uncredited) |