"I was down to the last frame on a roll of 35mm and I'd noticed during a rehearsal that the wind was blowing, so I'm hanging on and sure enough it blows and it's a fantastic shot - it's all luck, you know," Terry told BBC Bristol.
Terry took this shot while working in Fleet Street in 1962. Winston Churchill is leaving hospital - the former prime minister died just three months later. It is part of an exhibition of O'Neill's work showing at Bristol's Hotel du Vin until 9 June 2010.
Working for the Daily Sketch in 1963, Terry was sent to photograph an up-and-coming band, The Beatles. His exhibition The Stories Behind the Photographs, is part of the first Bristol Festival of Photography, taking place at venues across the city.
Terry has known the Rolling Stones for 50 years and he and the band "hung out" since their early days. "I was 22 at the start of the Sixties. Best decade of my life," Terry recalls.
In this image, shot at Terence Stamp's London apartment in 1963, Terry wanted to personify two young, fresh faces of the Sixties.
Like Bardot's hair in the wind, this was another lucky shot for Terry. A white dove landed on Audrey Hepburn's shoulder on the set of Two for the Road. Terry was fortunate enough to spend two whole weeks with the actors in St Tropez in 1964.
"I was friends with Ava Gardner and I told her 'I've got the chance to shoot your ex-boyfriend'. 'I'll write you a letter', she said. I walked on to the set [of Lady in Cement] handed him the letter, he laughed when he read it and said 'you're with me'.
This controversial 1970 image of Raquel Welch was shot for the cover of Esquire magazine to publicise the actress's role in One Million Years BC. In fact, it was not published for another 30 years, when it appeared in The Sunday Times Magazine.
This iconic shot of Michael Caine was taken on the set of Get Carter. Terry has remained friends with the actor and recently photographed him for the cover of his autobiography.
On arriving to shoot Paul Newman and Lee Marvin on location, Terry discovered Marvin had fallen out with the rest of the team. Luckily Marvin loved "the English" and Terry got some good frames, including this one of the two stars.
"I got taken to his office by his PR and I thought he knew everything about it. So we go in and something told me to start shooting... I took about half a roll of pictures and we got slung out," says Terry of his 1979 encounter with Steve McQueen.
Terry photographed Muhammad Ali preparing for a fight against Alvin Lewis in Dublin. "He was fearlessly focussed when training, but was a hugely entertaining character when you got to know him." Read more about Gallery 2c: www.gallery2c.com
Here, actress Faye Dunaway is pictured in a state of "dazed confusion" next to the pool at the Beverly Hills Hotel - the morning after winning an Oscar for Network in 1977. Read more about Bristol Festival of Photography: www.bfop.org