Gavin David Free is a British born filmmaker who wowed millions with his slow-motion videos on the Slow Mo Guys YouTube channel alongside Daniel Gruchy. He has also done a number of other videos with the production company Rooster Teeth. Gavin was born on May 23, 1988 in Oxfordshire, England. Before fame, he launched his first YouTube channel with his friend Daniel Gruchy in 2010. He has directed the video game inspired films Red vs. Blue: Recreation, and Red vs. Blue: Relocated. He worked with Chris Hemsworth doing the slow-motion cinematography for Snow White and the Huntsman.

He primarily works at Rooster Teeth Productions and is one of the six main hosts of Achievement Hunter since his promotion in 2012. He directed the machinima Red vs. Blue: Recreation and Red vs. Blue: Relocated. He is also known for his slow-motion cinematography, which he and his friend, Daniel Gruchy have a YouTube series, The Slow Mo Guys, featuring slow motion footage of various pranks and stunts, garnering millions of views since starting it in 2011. In April 2011 the channel was voted the winner of YouTube's On The Rise program which highlights up-and-coming YouTube partners on the homepage.

Gavin is a frequent member of the panel on the Rooster Teeth Podcast, a weekly chat show produced by Rooster Teeth. He was a fan of Rooster Teeth's content before he started working for the company. Gavin is also good friends with fellow Rooster Teeth employee and Achievement Hunter host Michael Jones as well as Ray Navaez Jr. Ray left AH on April 17, 2015 to become a full time Twitch streamer but they still occasionally hang out.

He lives in Austin, Texas with his girlfriend and former Rooster Teeth employee and The Know host Meg Turney. They have been dating since 2013.