De Niro obtained a taxi driver's license and drove a cab around New York City to prepare for his role in "Taxi Driver."
De Niro was granted honorary Italian citizenship in 2004 for his contributions to Italian cinema and culture.
De Niro underwent intense boxing training with the real-life Jake LaMotta to prepare for "Raging Bull" and even fought in real matches.
De Niro considered having his signature mole removed, but Martin Scorsese advised against it.
De Niro co-owns successful restaurants, including the Nobu chain and Tribeca Grill.
De Niro turned down a role in the first "Godfather" movie but later starred in "The Godfather Part II."
De Niro played Murray Franklin in "Joker," a character inspired by his role in "Taxi Driver."
De Niro is a devoted fan of the New York Yankees.
De Niro is fluent in Italian, a language he learned while spending time in Italy.
De Niro has an impressive art collection that includes works by Picasso, Warhol, and Basquiat.