Gus Johnson (b. 1995) is an American YouTuber who is most known for his skit-based videos. Since 2018, he has become a frequent collaborator with the Smosh cast, appearing notably in videos for the Try Not To Laugh Challenge series, and made multiple appearances as himself in ONE LETTER OFF YOUTUBERS.
- Gus has appeared in four Try Not To Laugh Challenge videos, tying with Joe Bereta as the most frequent guest on the show.
- Gus has never laughed while in the hotseat, earning himself a reputation as the "champion" of the Try Not To Laugh Challenge. His appearances on the show have become synonymous with an effort, most notably by Shayne Topp, to break his non-laughing streak.