Pitt, Jolie at "World War Z" London premiere

Actress and humanitarian campaigner Angelina Jolie poses with her fiance, actor, Brad Pitt, as she arrives for the world premiere of Pitt's latest film, "World War Z," in Leicester Square in central London, June 2, 2013.

It was the first public appearance for Jolie since she revealed in an article published May 14 edition in The New York Times that she chose to undergo surgery to minimize the risk she might develop breast cancer due to the inheritance of a "faulty gene."

Stuart C. Wilson/Getty Images for Paramount Pictures International

Angelina Jolie and Brad Pitt attend the world premiere of "World War Z," at the Empire Cinema on June 2, 2013 in London, England.

Brad Pitt arrives for the world premiere of his latest film, the zombie thriller "World War Z," at the Empire Cinema on June 2, 2013 in London, England.

Angelina Jolie poses as she arrives for the U.K. premiere of "World War Z," in Leicester Square in central London on June 2, 2013.

Angelina Jolie and Brad Pitt attend the world premiere of "World War Z," at the Empire Cinema on June 2, 2013 in London, England.

Angelina Jolie waves as she arrives with Brad Pitt for the premiere of "World War Z," in Leicester Square, central London, June 2, 2013.

Angelina Jolie poses with her fiance Brad Pitt as they arrive for the world premiere of Pitt's latest film, "World War Z," in Leicester Square in central London, June 2, 2013.

Angelina Jolie and Brad Pitt attend the world premiere of "World War Z," at the Empire Cinema on June 2, 2013 in London, England.

Actress and humanitarian campaigner Angelina Jolie smiles as she arrives at the premiere of "World War Z," in Leicester Square, London, June 2, 2013.

Jolie, 37, revealed last month that she chose to undergo surgery to minimize the risk she might develop breast cancer due to the inheritance of a "faulty gene." The actress's partner and fellow screen star Brad Pitt led worldwide praise, declaring Jolie heroic, followed by her doctors, other stars and thousands of supporters, who took to social media to praise her openness.

Angelina Jolie arrives with Brad Pitt for the world premiere of Pitt's latest film, "World War Z," in Leicester Square in central London, June 2, 2013.

Director Marc Forster attends the "black carpet" world premiere of "World War Z," at the Empire Cinema on June 2, 2013 in London, England.

Angelina Jolie attends the "World War Z" world premiere, at the Empire Cinema on June 2, 2013 in London, England.

Angelina Jolie greets fans at the world premiere of "World War Z," at the Empire Cinema in London on Sunday, June 2, 2013.