Vaastav: The Reality is a 1999 Indian Hindi-language action film written and directed by Mahesh Manjrekar in his directorial debut, and starring Sanjay Dutt, Namrata Shirodkar, and Sanjay Narvekar in lead roles, with Mohnish Behl, Paresh Rawal, Reema Lagoo and Shivaji Satam in supporting roles.

Vaastav was promoted with the tag-line "The Reality", referring to the harsh realities of life in the Mumbai underworld. The film is said to be loosely based on the life of Mumbai underworld gangster Chhota Rajan.

Released on 7 October 1999, Vaastav: The Reality received positive reviews from critics, with major praise directed towards Dutt's performance, which is widely considered as his career-best. It emerged as a major commercial success at the domestic and overseas box-office.

At the 45th Filmfare Awards, Vaastav: The Reality received 6 nominations, including Best Film, Best Director (Manjrekar), Best Supporting Actor (Narvekar) and Best Supporting Actress (Lagoo), and won 2 awards – Best Actor (Dutt) and Filmfare–Sony Award (Manjrekar).

Dutt's performance received universal critical acclaim and was unanimously regarded by critics amongst one of Indian cinema's most memorable onscreen characters. Over the years, it has become a cult film.

The film was remade into Telugu as Bhavani (2000), in Kannada as Bhagavan Dada (2000) and in Tamil language as Don Chera (2006). It was followed by the 2002 sequel Hathyar. In 2013, it was dubbed in Bhojpuri as Tohar Ko Thok Debe.