He has a younger brother, Matvey Eydelshteyn (English: Matthew Eidelstein) and is of Jewish heritage.

[1][2] His mother, Olesya Valeryevna Eydelshteyn, works as a teacher of stage speech at the Nizhny Novgorod Theater School named after Yevgeny Yevstigneyev.

[1] In 2018, Eydelshteyn passed the regional selection for the "Living Classics" competition for young readers and made it to the all-Russian final, held in Artek.

He gained fame after playing the leading role in the drama The Land of Sasha,[3] which made its worldwide premiere in February 2022 at the 72nd Berlin International Film Festival.

In December 2024, Eydelshteyn was cast in the second season of the Amazon Prime Video American spy television series Mr. & Mrs.