Critical Role is an American web series in which a group of professional voice actors play Dungeons & Dragons. The show started streaming partway through the cast's first campaign in March 2015. Campaign one ended in October 2017 after 115 episodes, and campaign two started in January 2018 and ended in June 2021 after 141 episodes. A number of one-shots were aired in the hiatus between the two campaigns. After campaign two was completed, the spin-off limited series Exandria Unlimited aired from June 2021 to August 2021. The third campaign aired from October 21, 2021 to February 6, 2025 with 121 episodes.

The series is broadcast on Thursdays at 19:00 PT on the Critical Role Twitch and YouTube channels and the Beacon streaming service, with the video on demand (VOD) being available to Beacon, YouTube, and Twitch subscribers immediately after the broadcast on their respective platforms. The VODs are made available for the public on Critical Role's website and uploaded to their YouTube channel on the Monday after the live stream. Prior to the COVID-19 pandemic, the show had broadcast live, but has been pre-recorded since its return for episode 100 of campaign two.

The cast own the intellectual property from the show, and the show also lends its name to the studio owned by the cast—Critical Role Productions. The studio has produced Critical Role since 2018. A number of licensed works based on the show have been released, such as several comic books and two official campaign setting guides. The Legend of Vox Machina, the animated series based on the first campaign of Critical Role, premiered January 28, 2022 on Amazon Prime Video. Mighty Nein, an upcoming animated series based on the second campaign, was announced in January 2023.