Ian Michael Roberts (born July 29, 1965) is an American actor, comedian, writer, and a founding member of the famed Upright Citizens Brigade improv and sketch comedy troupe.

In the early 1990s, Roberts and Matt Besser (along with several other Chicago improv comics) formed the Upright Citizens Brigade sketch comedy troupe.

Amy Poehler and Matt Walsh later joined them, forming the UCB foursome who went on to create their own Comedy Central series and open the affiliated Upright Citizens Brigade Theatre in New York and Los Angeles, well-known venues for live alternative comedy and improv where many other comics have launched their careers.

Roberts, along with his other UCB castmates, has appeared in sketch comedy segments on Late Night with Conan O'Brien for many years.

His character, Tom Wilsonberg, featured in the episode "Stowaway," was an entrepreneur with a gambling addiction and eccentric behavior.