Single White Female (1992)

After splitting from her fiance, Manhattan professional Allison Jones opens her apartment to a new roommate, Hedra Carlson. At first, the two women form a quick bond, and the arrangement seems to offer Allison a fresh start. But as Hedra grows more attached, Allison notices unsettling signs that her tenant is copying her life, her appearance, and her relationships, turning their shared home into a place of mounting danger.