From Wiki:
Heat is a 1995 American action drama film written and directed by Michael Mann. It stars Al Pacino, Robert De Niro, and Val Kilmer. The film was released on December 15, 1995.
De Niro plays a professional burglar who is a calm and methodical introvert, while Pacino plays a veteran LAPD homicide detective whose devotion to his job causes him to neglect his personal problems. The central conflict of the film was based on the experiences of former Chicago police officer Chuck Adamson and his pursuit of a criminal named McCauley in the 1960s, from which the name of De Niro's character, Neil McCauley, was derived.
Heat marked the first time that Pacino and De Niro appeared together onscreen, garnering much anticipation from film fans. Although both actors starred in The Godfather Part II 21 years earlier, they were not in any scenes together. The famous scene in Heat, where Pacino and De Niro share screen time together was shot at a Beverly Hills Restaurant, known as "Kate Mantillini" located at 9101 Wilshire Blvd, Beverly Hills, CA 90210. [1] Pacino and De Niro appeared together again in the 2008 film Righteous Kill.
The film is technically a remake of L.A. Takedown, a 1989 made-for-television film which was also written and directed by Mann; Mann had been trying to get Heat made for over a decade, and created L.A Takedown as a simplified version after his efforts were unsuccessful. Despite not receiving any Academy Award nominations, Heat was a critical and commercial success, grossing over $187 million worldwide.