Soviet and Russian theater and film actor, singer. Performer of the role of "Mommy" in the film "The Republic of ShKID". Aleksandr Kavalerov was born on July 10, 1951 in Leningrad (now Saint Petersburg). His father was Semyon Semyonovich Epstein, a Jew. His mother was Aleksandra Petrovna Kavalerova (1925-2003), a Russian. He did not know his father, bore his mother's surname and a patronymic derived from her name. At the age of seven he accidentally ended up on a film set – he appeared in the film "The Baltic Sky" in the role of a thin Leningrad child survivor of the siege. After this film debut Aleksandr appeared several times in episodes, took part in dubbing, while continuing to study at school. Widespread fame came to him in 1966 after the release of the film "The Republic of ShKID" by director Gennady Poloka, in which he played the role of Kostya Fedotov – Mommy. After the film "The Republic of ShKID" enormous popularity came to the young actor. His character was especially remembered by viewers thanks to the songs performed in the film "A cat has four legs" and "Since childhood I wandered through shelters". In 1967 together with Bulat Okudzhava he sang the song "Drops of the Danish King" in the film Zhenya, Zhenechka and "Katyusha". In 1971 he played the main role in Igor Shatrov's war film "A Minute of Silence" (Sergei Krasheninnikov). In 1976 he tried to enroll at VGIK in Lev Kulidzhanov's course. But studying did not work out: it was a period when he was filming especially a lot, and he simply had no time for study.

In 1980 he played the main role in the film "Courage" (Semyon) – a film novella based on the novel of the same name by Vera Ketlinskaya about the construction in the taiga of the new city of Komsomolsk-on-Amur. In the 1980s the actor was practically no longer invited to film, he appeared in only a few secondary roles. In the 1990s he again returned to work, resumed concert activity, and began to act in films. In 1991 he played the main role in the film "The Man from the Dump" (Tima). He was an actor of the variety theater "Benefis" (Saint Petersburg). In the 2000s he played several roles in TV series. He could be seen in the films "Keys to Death" (Syunyaev), "Lost Paradise" (Zinovy Sysa), "Black Raven" (Tyukavin), "Liteyny, 4 (Season 1)" (Voldemar), "Family House" (Boris Grigoryevich) and others. His last work in cinema was the role of a robber in the mystical drama "Retribution". He was married seven times. He had 6 children and four grandchildren. True, he himself said that the number of wives attributed to him was exaggerated. Besides, with some he lived in a civil marriage. In his marriage to actress Vera Kavalerova a son, Aleksandr, was born. In the last years of his life the actor was seriously ill. His entire small pension went to medicines. Since 2008 he became a group 2 visually disabled person, suffered a microstroke and two microinfarctions. He died on June 17, 2014 in the Aleksandrovskaya Hospital in his 63rd year. He was buried at the Kinoveevskoe Cemetery.