oh! He's amazing: Robert Downey Jr. 1

Robert John Downey, Jr. (born April 4, 1965) is an American actor who made his screen debut at the age of five, appearing in his father Robert Downey, Sr.'s film Pound. He has appeared in roles associated with the Brat Pack, such as Less Than Zero and Weird Science. Other films he has starred in include Air America, Soapdish, and Natural Born Killers. He starred as Charlie Chaplin, the title character in the 1992 film Chaplin, earning him a nomination for the Academy Award for Best Actor.

After being released from the California Substance Abuse Treatment Facility and State Prison in 2000 for drug charges, Downey joined the cast of the TV series Ally McBeal playing Calista Flockhart's love interest. His performance was praised and he received a Golden Globe Award for Best Performance by an Actor in a Supporting Role in a Series, Miniseries, or Television Film. His character was written out when Downey was fired after two drug arrests in late 2000 and early 2001. After one last stay in a court-ordered drug treatment program, Downey finally achieved sobriety.

His more recent films include The Singing Detective, Kiss Kiss Bang Bang, A Scanner Darkly, Gothika, Zodiac and Tropic Thunder. In 2008, Downey played the role of Marvel superhero Tony Stark / Iron Man in the live action film Iron Man, a role he reprised in Iron Man 2, Marvel's The Avengers, and Iron Man 3. He reprised his role in a cameo appearance in The Incredible Hulk. He will again reprise his role in the upcoming films, Avengers: Age of Ultron and another Avengers sequel. In 2009, he played the title character in Guy Ritchie's Sherlock Holmes and again in 2011's Sherlock Holmes: A Game of Shadows. He's starred in six movies that have each grossed over $500 million at the box office worldwide. Two of those films, The Avengers and Iron Man 3, each earned over $1 billion. Downey tops the Forbes list of Hollywood's Highest-Paid Actors with an estimated $75 million in earnings between June 2012 and June 2013.

Downey was born in Manhattan, New York City, New York, the younger of two children. His father, Robert Downey, Sr., is an actor, writer, producer, cinematographer, and director of underground films, and his mother, Elsie (née Ford), is also an actress and appeared in Downey, Sr.'s films. His paternal grandfather was of Lithuanian Jewish ancestry and his paternal grandmother was of Irish Canadian and Hungarian ancestry. His mother is of Scottish, German, and Swiss German descent. His father was born "Robert Elias", and changed his last name to "Downey" (after his stepfather James Downey), when he was a minor and wanted to enlist in the Army. He and his older sister, Allyson, grew up in Greenwich Village.

As a child, Downey was "surrounded by drugs". His father, a drug addict, allowed Downey to use marijuana at age six, an incident which his father has said that he now regrets. Downey stated that drug use became an emotional bond between him and his father: "When my dad and I would do drugs together, it was like him trying to express his love for me in the only way he knew how." Eventually, Downey began spending every night abusing alcohol and "making a thousand phone calls in pursuit of drugs".

During his childhood Downey had minor roles in his father's films. He made his acting debut at the age of five, playing a sick puppy in the absurdist comedy Pound (1970), and then at age seven appeared in the surrealist Greaser's Palace (1972). At the age of ten, he was living in England and studied classical ballet as part of a larger curriculum. He attended the Stagedoor Manor Performing Arts Training Center in upstate New York as a teenager. When his parents divorced in 1978, Downey moved to California with his father, but in 1982 he dropped out of Santa Monica High School and moved back to New York to pursue an acting career full-time.

Downey and Kiefer Sutherland, who shared the screen together in the 1988 film 1969, were roommates for three years when he first moved to Hollywood to pursue his career in acting.