A citizen of the United States is an American. United States, American and U.S. refer to the country adjectivally (American values, U.S. forces). American rarely refers to subjects not connected with the United States.
Costume Department | Actress. Anna Wintour was born in Hampstead, London, England, the daughter of an American mother, Eleanor Trego (Baker), and an English father, Charles Wintour, former Editor of the Evening Standard. She is from an upper-class family, with many prominent ancestors.
That's the Hepburn mystique. What you see in Audrey Hepburn is exactly what you get, says Lawrence E. Bruce Jr., who is president of the U.S. Committee for UNICEF and has traveled with her to Ethiopia. There is no public and private persona. She is what she seems to be.