Angry Birds is a Finnish video game franchise created by Rovio Entertainment. Inspired by Crush the Castle, the first game in the series was initially released in December 2009 for Apple iOS. As of October 2010, 12 million copies of the game were purchased from App Store. The company then released ports of the game for other touchscreen smartphone operating systems, including Android, Symbian and Windows Phone. The franchise has since been expanded to include video game console and PC ports.

Angry Birds has been praised for its successful combination of fun gameplay, comical style, and low price. Its popularity led to many spin-offs, versions of Angry Birds being created for PCs and gaming consoles, a market for merchandise featuring its characters, a televised cartoon series, and an upcoming feature film. In January 2014 there had been over two billion downloads across all platforms, including both regular and special editions: as of July 2015, the series’ games have been downloaded more than three billion times collectively, making it the most downloaded freemium game series of all time. The original Angry Birds has been called "one of the most mainstream games out right now", "one of the great runaway hits of 2010", and "the largest mobile app success the world has seen so far". An animated feature film based on the series will be released by Columbia Pictures on May 20, 2016, and the first main-series sequel, Angry Birds 2, was released on July 30, 2015.