Zombieland is an American zombie comedy horror, written by Rhett Reese and Paul Wernick and directed by Ruben Fleischer. The film stars Woody Harrelson, Jesse Eisenberg, Emma Stone, and Abigail Breslin as survivors of a post-zombie apocalypse. Together they take an extended road trip in an attempt to find a sanctuary free from zombies; Columbus (Eisenberg) follows a set of "rules" designed to keep them alive where others have failed; Tallahasee (Harrelson) kills zombies in a variety of creative ways while trying to "enjoy the little things" in a ruined world.
The film received positive critical reviews and was a commercial success: it grossed more than $60.8 million in 17 days, surpassing the Dawn of the Dead remake to become the top-grossing zombie film to date. It had the biggest opening weekend of any film in Woody Harrelson's career at $25 million. The $18 million taken by Indecent Proposal (1993) was Harrelson's previous best weekend debut.
P.S. The Bill Murray cameo was mostly improvised. And genius.