Jack Amiel is an American TV writer, producer and screenwriter. He is best known for co-creating Cinemax's period medical drama The Knick, and for writing the films Raising Helen (2004), The Shaggy Dog (2006) and Big Miracle (2012), all with writing partner Michael Begler.

Amiel was born and raised in Manhattan, New York. He is of Jewish ancestry. He attended Fieldston School in New York City, and the University of Wisconsin–Madison, where he majored in History.

He met his future writing partner Michael Begler while they were in college together.and both entered the university's musical-comedy contest, Humorology.

After college, Amiel moved to Los Angeles and worked as a PA on a number of Fox sitcoms. He and Begler, who was working as a PA in New York, decided to write together shortly after, and Begler soon joined Amiel in Los Angeles. Their first writing job was on Fox's Herman's Head.

Amiel worked consistently from that point onwards, writing - with Begler - on a number of sitcoms, including Empty Nest, Minor Adjustments, The Jeff Foxworthy Show, The Tony Danza Show and Malcolm in the Middle.

In the mid-2000s, Amiel transitioned into writing feature films, penning the scripts for the romantic comedies The Prince and Me and Garry Marshall's Raising Helen, both released in 2004.

In 2006, Amiel wrote Disney's The Shaggy Dog, starring Tim Allen and Robert Downey Jr.

Amiel wrote 2012's Ken Kwapis-directed Big Miracle starring Drew Barrymore.