How tall is James Gunn

American director and writer, known for Guardians of the Galaxy, Super and Slither. In the past he claimed 6'1", although in recent years said "I'm a little over six feet tall." and "The Gunn brothers don’t all claim to be six feet. I am six feet, my brother is not. I will be publicly measured, no problem."Judy Greer with James
Photos by PR Photos

I’m over 6′. People often think I’m small because I’m pictures next to giants like [Chris Pratt] & [Dave Bautista]

Djimon's one of the nicest guys around. He's a big guy, over 6'2, and is used to being the biggest guy on set - like he was on Gladiator and other films. He was shocked early on when he shared a car to dinner with Dave Bautista and Chris Pratt who are both enormous and said he felt 'tiny.' Actors are generally small people - I'm six feet tall and am used to being taller than almost all of the actors I'm directing. But on this film all of our primary actors (with the exception of Michael Rooker) were over 6'1 - Chris, Dave, Lee Pace, Djimon, John C Reilly, Benicio Del Toro, Peter Serafinowicz - it was pretty incredible.
-- ComicBook.com

I wish actors (especially men) would tell the truth about their height when casting. Casting a whole show can be a balance of a lot of things, including heights, & easily 50% of the time male actors exaggerate how tall they are, sometimes by a lot, on their resumes.