A trailer or preview is an advertisement or a commercial for a feature film that will be exhibited in the future at a cinema. The term "trailer" comes from their having originally been shown at the end of a feature film screening. That practice did not last long, because patrons tended to leave the theater after the films ended, but the name has stuck. Trailers are now shown before the film (or the A movie in a double feature) begins.

Movie trailers have now become popular on DVDs and Blu-ray Discs, as well as on the Internet and Mobile devices. Of some 10-billion videos watched online annually, film trailers rank #3, after news and user-created video.

The first trailer shown in a U.S. film theater was in November 1913, when Nils Granlund, the advertising manager for the Marcus Loew theater chain, produced a short promotional film for the musical The Pleasure Seekers, opening at the Winter Garden Theatre on Broadway. Loew adopted the practice, which was reported in a wire service story carried by the Lincoln, Nebraska Daily Star, describing it as "an entirely new and unique stunt", and that "moving pictures of the rehearsals and other incidents connected with the production will be sent out in advance of the show, to be presented to the Loew’s picture houses and will take the place of much of the bill board advertising". Granlund was also first to introduce trailer material for an upcoming motion picture, using a slide technique to promote an upcoming film featuring Charlie Chaplin at Loew's Seventh Avenue Theatre in Harlem in 1914. Up until the late 1950s, trailers were mostly created by National Screen Service and consisted of various key scenes from the film being advertised, often augmented with large, descriptive text describing the story, and an underscore generally pulled from studio music libraries. Most trailers had some form of narration and those that did featured stentorian voices.

Akshay Kumar (born Rajiv Hari Om Bhatia on 9 September 1967) is an Indian film actor, producer, comedian and martial artist who has appeared in over a hundred Hindi films. He has nominated for Filmfare Award several times and won two times. When he began his acting career in the 1990s, he primarily starred in action films and was particularly known for his appearances in feature films commonly called the "Khiladi series", which included Khiladi (1992), Main Khiladi Tu Anari (1994), Sabse Bada Khiladi (1995), Khiladiyon Ka Khiladi (1996), Mr. and Mrs. Khiladi (1997), International Khiladi (1999), and Khiladi 420 (2000), as well as other action films such as Waqt Hamara Hai (1993), Mohra (1994), Elaan (1994) and Suhaag (1994).

Later he also gained fame for his drama, romance and comic roles. He started becoming known for his performances in romance films like Yeh Dillagi (1994) and Dhadkan (2000) as well as drama films such as Ek Rishtaa (2001). His comic performances in comedy films such as Hera Pheri (2000), Mujhse Shaadi Karogi (2004), and Garam Masala (2005) met with acclaim. His success further rose in 2007, when he starred in four consecutive commercial hits. He has thus established himself as one of the leading actors in Hindi cinema.

Mahesh Babu (born Mahesh Babu Ghattamaneni on 9 August 1975) is an Indian film actor best known for his work in Telugu cinema. Born to actor Krishna, Mahesh Babu faced the camera at the age of four as a child artist in 1979's Needa. His first leading role was in the film Rajakumarudu, which was released in August 1999.

After playing the role of a young Kabaddi player in the 2003 blockbuster film Okkadu, Mahesh continued in this vein, gaining mass appeal and appearing in many successful films such as Murari (2001), Athadu (2005), Pokiri (2006), Dookudu (2011) and Business Man (2012). These accomplishments, have established him as one of the most sought after actors in Telugu Cinema. He was listed at 5th position among Times 50 Most Desirable Men for the year 2011 and at 12th place the year before.

Mahesh Babu has worked in nine films as a child artist and in seventeen films as a lead actor till date. He has won six Andhra Pradesh state Nandi Awards, two Filmfare Best Telugu Actor Awards and two CineMAA Awards. In addition to the films, he also endorses several brands such as Thums Up, Navratna Oil, Univercell, Amrutanjan,Provogue,Idea, Vivel, Jos Alukkas and Santoor Soap in Andhra Pradesh.