Killing Gunther is a 2017 American mockumentary action comedy film written and directed by Taran Killam, in his directorial debut.

Arnold Schwarzenegger stars as the titular Gunther alongside Killam, Cobie Smulders, and Bobby Moynihan.

Hiring a camera crew to document the process for video proof, Blake assembles a team: his friend Donnie, an explosives expert; Sanaa, daughter of legendary hitman Rahmat Fairouza; Gabe, an inexperienced technology 'expert'; and Ashley, Blake's elderly mentor, who has a heart attack.

The team sets up a fake hit in Miami to draw Gunther out, and visit Cheyenne, a gun dealer.

Finding both occupants dead, the team celebrate drunkenly at a bar, and Blake sleeps with the bartender, while Sanaa and Donnie spend the night together.

The team is awakened in the middle of the night by Rahmat trying to kill Donnie for sleeping with his daughter, claiming that Blake texted him.

Forced to lie low at Gabe's cramped apartment with the documentary crew, Blake is contacted by Donnie, who wants to retire to be with Sanaa.

It was announced that Arnold Schwarzenegger would star as Gunther, with Cobie Smulders, Bobby Moynihan, Paul Brittain, Kumail Nanjiani, Randall Park, and Ryan Gaul cast as well, and filming was expected to begin in June 2016.

The site's critical consensus reads, "Despite a game cast led by an enjoyably over the top Arnold Schwarzenegger, Killing Gunther feels like a sketch overstretched to feature length.