In Pics: Robert Downey Jr Birthday Special: From Sherlock Holmes to Iron Man, Best Roles of RDJ

Kiss Kiss Bang Bang (2005): The portrayal of Harry Lockhart in ‘Kiss Kiss Bang Bang’ is largely regarded as Downey's pre-Marvel career resurgence moment, and that's why the film is ranked first on our list. As a burglar, Downey himself admits that this innovative, darkly comedic criminal thriller is just about his greatest work to date. (Image Credits: Twitter/@OnlyFilmMedia)

Iron Man: Actor Robert Downey Jr. is known as Iron Man of Hollywood. A star in the Marvel Cinematic Universe (MCU), Robert is most recognised for his role as Tony Stark. If you didn't know, Robert has portrayed Iron Man multiple times and most recently in Avengers: Endgame. (Image Credits: Twitter/@ScarletSpeeds16)

Good Night, And Good Luck. (2005): This film stars Robert Downey Jr. in the title role, who portrays CBS employee Joe Wershba. He starred in this stunningly filmed, brilliantly played portrayal of social justice at a time when his career was starting to turn for the better and Good Night and Good Luck was a good indicator of that. (Image Credits: IMDb)

Sherlock Holmes (2009): Robert Downey Jr. received his second Golden Globe for playing the legendary 19th century private detective with a phoney, but yet believable, British accent. Actor Robert Downey Jr stars as famed investigator Sherlock Holmes in this action-packed mystery drama. (Image Credits: IMDb)

Chaplin (1992): Robert Downey Jr. as a recognised media man whose personal life interferes with his innovative job in this historical drama. Downey's striking and recognisable depiction of the movie star won him enormous acclaim from critics and public alike, as well as his first nomination for an Academy Award. (Image Credits: IMDb)

Wonder Boys (2000): In this gloomy comedy-drama, RDJ shines in the supporting role of a writer. (Image Credits: IMDb)

Tropic Thunder (2008): To portray an African-American soldier in a film, Downey Jr. underwent a skin colouring procedure in the film. His role in 'Tropic Thunder' earned him widespread critical praise. (Image Credits: IMDb)