Stallone saw a decline in popularity in the early 2000s but rebounded back to prominence in 2006 with a sixth installment in the Rocky series and 2008 with a fourth in the Rambo series. These include Cobra, Tango and Cash, Cliffhanger, the better received Demolition Man, and The Specialist. From the mid-1980s through to the late 1990s, Stallone would go on to become one of Hollywood's highest-paid actors of that era by appearing in a slew of commercially successful action films which were however generally panned by critics. Stallone would play the role in a total of five Rambo films (1982–2019). Originally an adaptation of the eponymous novel by David Morell, First Blood’s script was significantly altered by Stallone during the film’s production.

This changed with the successful action film First Blood in which he portrayed the PTSD-plagued soldier John Rambo. Up until 1982, Stallone's films were not big box office successes unless they were Rocky sequels, and none received the critical acclaim achieved with the first Rocky. Philadelphia has a statue of his character Rocky placed permanently near the museum, and he was voted into the International Boxing Hall of Fame.

Stallone's use of the front entrance to the Philadelphia Museum of Art in the Rocky series led the area to be nicknamed the Rocky Steps. Stallone's film Rocky was inducted into the National Film Registry, and had its props placed in the Smithsonian Museum. In 1977, Stallone was the third actor in cinema to be nominated for two Academy Awards for Best Original Screenplay and Best Actor. In the films, Rocky is portrayed as an underdog boxer who fights numerous brutal opponents, and wins the world heavyweight championship twice. Stallone subsequently found gradual work as an extra or side character in films with a sizable budget until he achieved his greatest critical and commercial success as an actor and screenwriter, starting in 1976 with his role as boxer Rocky Balboa, in the first film of the successful Rocky series (1976–present), for which he also wrote the screenplays. After his beginnings as a struggling actor for a number of years upon arriving to New York City in 1969 and later Hollywood in 1974, he won his first critical acclaim as an actor for his co-starring role as Stanley Rosiello in The Lords of Flatbush. Sylvester Enzio Stallone ( / s t ə ˈ l oʊ n/ born Michael Sylvester Gardenzio Stallone, ( )July 6, 1946) is an American actor and filmmaker.

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