Brennan Lee Mulligan

Brennan Lee Mulligan is an actor, comedian, writer, producer and showrunner, as well as a partner at the comedy streaming platform, Dropout. He is one of the most visible figures in the tabletop role playing space and executive produces, showruns and hosts Dropout's actual play tabletop show, Dimension 20, which recently sold out upwards of 20,000 tickets at Madison Square Garden in under five minutes.

In addition to his work on Dimension 20, Mulligan stars in the actual play podcast, Worlds Beyond Number, the most pre-launch subscribed podcast on Patreon to date and the #1 fiction podcast in the U.S. upon its release. Together with his wife, Izzy Roland, Mulligan also performs in Bigger! With Brennan and Izzy, a live improv show that has delighted audiences worldwide by transforming quirky real-life stories into hilarious improvised scenes. Mulligan is also a frequent improviser, collaborator and producer on other fan-favorite Dropout properties like Game Changer, Make Some Noise and Very Important People.

In addition to his work on Dimension 20, Mulligan expanded his role in the tabletop roleplaying universe by serving as Dungeon Master for Critical Role's celebrated campaigns Exandria Unlimited: Calamity and Exandria Unlimited: Divergence. In October of 2025, Mulligan will again join forces with Critical Role to serve as Dungeon Master for their forthcoming campaign.

Mulligan resides in Los Angeles.