Keith Gerald Holkins (born February 6, 1976) is an American writer. He is the original author of the webcomic Penny Arcade along with its artist Mike Krahulik. Holkins sometimes uses the pseudonym "Tycho Brahe", the name of a Penny Arcade character based on Holkins.
Together with Krahulik, Holkins created the Penny Arcade Expo beginning in 2004, a series of gaming festivals held in Seattle, Boston, Australia, Philadelphia, and San Antonio. He is also a co-founder of Child's Play, a multimillion-dollar charity which organizes toy drives for children's hospitals.
Along with Krahulik, Holkins was included on the 2010 Time 100 for their work on Penny Arcade.