A "Film Debut" refers to the first appearance of an actor, director, or film in the movie industry. This moment is significant as it marks the beginning of a career in film, often leading to future opportunities and recognition. For example, when a young actor like Emma Watson starred in Harry Potter and the Sorcerer's Stone, it was her film debut, launching her into stardom. Debuts can also apply to films themselves. A movie's premiere is its first public showing, which can create buzz and excitement. For instance, the debut of Avatar in 2009 was highly anticipated and went on to become one of the highest-grossing films of all time.