Mark Allen Webber is an American actor. He is known for his roles in the films Snow Day (2000), The Laramie Project (2002), Weapons (2007), and as Stephen Stills in Scott Pilgrim vs. the World (2010) and Scott Pilgrim Takes Off (2023).

Snow Day is a 2000 American comedy film directed by Chris Koch, written by Will McRobb and Chris Viscardi, and produced by Paramount Pictures and Nickelodeon Movies. It stars Chris Elliott, Mark Webber, Jean Smart, and Chevy Chase with supporting roles by Schuyler Fisk, Pam Grier, Zena Grey, Josh Peck, Emmanuelle Chriqui, and David Paetkau. The film premiered on January 29, 2000, and was theatrically released on February 11, 2000. It takes place during the events of a record snow day in upstate New York, depicting various subplots including a group of kids planning to thwart a snowplow driver in an attempt to get a second snow day. This is the first of two films to star both Josh Peck and Zena Grey, the other being Max Keeble's Big Move, released the following year.