A production assistant, also known as a PA, is a job title used in filmmaking and television for a person responsible for various aspects of a production. The job of a PA can vary greatly depending on the budget and specific requirements of a production as well as whether or not the production is unionized.

Production assistants on films are sometimes attached to individual actors or filmmakers.

In unionized television and feature film, production assistants are usually divided into different categories: "Set PA", "Truck PA", "Locations PA", "Office PA", or "Set Runner" and "Extra PA or Daily" - Variations exist depending on a show's structure or region of the United States or Canada.

Office PAs usually spend most hours in the respective show's production office handling such tasks as phones, deliveries, script copies, lunch pick-ups, and related tasks in coordination with the production manager and production coordinator.

Set PAs work on the physical set of the production, whether on location or on a sound stage. They report to the assistant director (AD) department and key set PA if one is so designated. Duties include echoing (calling out) "rolls" and "cuts", locking up (making sure nothing interferes with a take), wrangling talent and background, facilitating communication between departments, distributing paperwork and radios, and related tasks as mandated by the ADs. Set PAs usually work 12- to 16-hour days with the possibility at the end of a shoot to work more than 20 hours a single day and are regularly the "first to arrive and the last to leave".

Paul Thomas Anderson (born June 26, 1970), is an American film director, screenwriter, and producer. He has written and directed feature films: Hard Eight (1996), Boogie Nights (1997), Magnolia (1999), Punch-Drunk Love (2002), There Will Be Blood (2007), and The Master (2012). He has been nominated for five Academy Awards — There Will Be Blood for Best Achievement in Directing, Best Motion Picture of the Year, and Best Adapted Screenplay; Magnolia for Best Original Screenplay; and Boogie Nights for Best Original Screenplay.

Anderson has been hailed as being "one of the most exciting talents to come along in years" and "among the supreme talents of today." After the release of Boogie Nights and Magnolia, Anderson was praised as a wunderkind. In 2004, Anderson was ranked twenty-first on The Guardian's list of the forty best directors. In 2007, Total Film named him the twentieth greatest director of all time, while the American Film Institute regards him as "one of American film's modern masters." In 2011, Entertainment Weekly named him the tenth-greatest working director calling him "one of the most dynamic directors to emerge in the last twenty years."