Smosh has grown from one of YouTube’s earliest sketch comedy channels into the largest independent, creator-led comedy brand on the internet. Courtney joined Smosh in 2015, where she holds the role of Creative Director, as well as writes, directs, produces, and acts in a number of sketches and livestreams.

Since joining Smosh, Courtney Miller has been instrumental in shaping the channel's evolving voice through her on-screen presence and behind-the-scenes contributions. She has played key roles in several prominent Smosh series, including Smosh’s Seriously Super Stupid Sleepover, URL, Culinary Crimes, and more.