Lyda Borelli (22 March 1884 - 2 June 1959) was an Italian actress, her career in theatre started in 1902.

Between 1913 and 1918 Borelli made 14 films and appeared in 2 documentaries. She often portrayed vamps who end up committing suicide via poison. Her acting was mainly based on excessive gestures, painful expressions and languid gazes. Antonio Gramsci, who, in 1917 worked as a theatre reviewer, criticised her stating she represented a heightened form of sensuality, "a part of a primordial and prehistoric humanity" that had managed to cast a spell on the audience.