Doppelganger (1993)

A woman moves from NYC to LA after a murder, in which she is implicated. She is followed by what is apparently her evil alter- ego. She moves into a room for rent by a writer, and he begins having an affair with her, but after some strange things happen, he's not so sure if the affair is with her or her doppelganger.

Doppelganger is a horror movie featuring Drew Barrymore and directed by Avi Nesher.

Doppelganger is currently streaming for free (ad-supported) on Crackle, Freevee, Peacock, Peacock Premium, Plex, Plex Player, Shout! Factory TV, The Roku Channel and Tubi TV and it's also available on fuboTV.

It is also possible to buy Doppelganger on Amazon Video.