A Mother's Heart (Russian: Сердце матери, romanized: Serdtse materi) is a 1965 Soviet historical revolutionary film directed by Mark Donskoy.

The film unfolds between 1886 and 1893, portraying the life of Maria Alexandrovna Ulyanova, the resilient mother of Vladimir Lenin, as she navigates the trials and sacrifices faced by her revolutionary family.

A cultured and enlightened woman from a prosperous background, Maria Alexandrovna endures the loss of her husband, Ilya Nikolaevich, in 1886, and shoulders the burden of raising her children alone.

At his trial, she sits in the crowd, seeing only her son as he utters his final words, asking for her understanding and forgiveness, a moment that leaves an indelible mark on her.

By 1893, as the young Lenin moves to St. Petersburg to embrace the revolutionary struggle, Maria Alexandrovna remains, in his words, a "steadfast ally," embodying the spirit of commitment and love that sustains her family’s radical path.