Blockbuster, as applied to film, theatre, and sometimes also video games, denotes a very popular or successful, usually big budget production.

Blockbuster LLC, also known as Blockbuster and formerly Blockbuster Video Entertainment, Inc., is an American-based provider of home movie and video game rental services through video rental shops, DVD-by-mail, streaming, video on demand, and cinema theater. At its peak in 2004, Blockbuster consisted of nearly 60,000 employees and over 9,000 stores.