A content annotation tool is disclosed. In a configuration, a portion of a movie may be obtained from a database. Entities, such as an actor, background music, text, etc. may be automatically identified in the movie. A user, such as a content producer, may associate and/or provide supplemental content for an identified entity to the database. A selection of one or more automatically identified entities may be received. A database entry may be generated that links the identified entity with the supplemental content. The selected automatically identified one or more entities and/or supplemental content associated therewith may be presented to an end user.