Terence Patrick O'Neill CBE (30 July 1938 – 16 November 2019) was a British photographer, known for documenting the fashions, styles, and celebrities of the 1960s.

O'Neill was born to Irish parents in Romford, Essex,[5] and began his career working in a photographic unit for an airline at London's Heathrow Airport.

During this time, he photographed a sleeping figure in a waiting area who, by happenstance, was revealed to be Home Secretary Rab Butler.

Also considered among his most famous images[11] are a series of American actress Faye Dunaway (his girlfriend at the time) at dawn on 29 March 1977, lounging next to the swimming pool at the Beverly Hills Hotel the morning after winning the Academy Award for Best Actress for Network, with several newspapers scattered around her and her Oscar statuette prominently shown on a table beside her breakfast tray.

[16][18] In 2003, he was quoted in the U.S. tabloid magazine Star as saying Liam was adopted and not their biological son, contrary to Dunaway's public assertions.