Svengali is a 1954 British drama film directed by Noel Langley and starring Hildegard Knef, Donald Wolfit and Terence Morgan, based on the 1894 novel Trilby by George du Maurier. Svengali hypnotises an artist's model into becoming a great opera singer, but she struggles to escape from his powers. It was distributed in the United States by Metro-Goldwyn-Mayer.

Hildegard Frieda Albertine Knef was a German actress, singer, and writer. She was billed in some English-language films as Hildegard Neff or Hildegarde Neff.