Mr. Harrigan's Phone is an American horror film written and directed by John Lee Hancock based on the novella of the same name by Stephen King from the collection If It Bleeds.

Craig, a young boy, befriends the elderly billionaire John Harrigan. Craig then gives him a mobile phone.

However, when the man dies, Craig discovers that he can communicate with his friend from the grave who was a 87 year old billionaire.

Eventually, Mr. Harrigan dies and later, Craig leaves a voicemail on Mr. Harrigan's old phone about a bully. The bully is later found to have died by suicide.

Craig then decides not to use the phone with Mr. Harrigan's number and switches to a newer model. The movie is about themes of loneliness, friendship, and the evils of technology.

Harrigan dies, and Craig's phone somehow still seems to be communicating with his – the heart of the movie resides in those exchanges, and the bond that forms between the two.

The character of Craig is played by Jaeden Martell, 19, he also appeared in the mystery film Knives Out and starred in the miniseries Defending Jacob.