She was married to Tony Hatch from 1966 until their divorce in 2002. Jackie wrote over 400 songs, many in collaboration with Hatch. In 1965, she had a number one hit performing 'Where Are You Now My Love' which they wrote. As a team, they went on to write many hits for numerous artists including Petula Clark and Scott Walker. They also wrote theme songs for TV shows including Mr & Mrs, The Morecambe & Wise Show and for the Australian TV series Neighbours. Together with Hatch, they started their own music publishing company M & M Music. In 2005, she married Colin Gregory.