I Saw What You Did is a 1965 American horror thriller film released by Universal Pictures and starring Joan Crawford and John Ireland.

The plot follows two teenage girls who find themselves in serious danger after making a prank phone call to a man who just murdered his wife.

Libby places a call to Steve Marak, a man who had just murdered his wife Judith and disposed of her body in the woods.

Amy snatches the registration card from the car before Libby drives away and gives it to Marak, telling him to keep it as a souvenir of his last fling.

While Kit's father is driving her home, a news report over the car's radio announces that a woman's body has been found in the woods and provides a description of a man who was seen leaving the burial site.

"[1] Saturday Review noted "Unfortunately, there is little for the eye, ear, or mind in William Castle's egregiously low-budgeted I Saw What You Did, an attempt at terror starring Joan Crawford and John Ireland.

"[7] Variety wrote "[The film] is a well-produced, well-acted entry in the suspense-terror field....[Crawford's] slightest gesture or expression...conveys vivid emotion.