By Josie Griffiths Updated: 14:55 ET, May 13 2021 BEFORE winning The X Factor and enjoying a lengthy music career, Leigh-Anne Pinnock was a waitress at Pizza Hut in her home of High Wycombe. And now, she's part of one of the world's most successful girlbands, adored by Mixers across the globe, engaged to footballer Andre Gray and is expecting her first child. 5 How old is Leigh-Anne Pinnock? Leigh-Anne Pinnock is 29 years old. She celebrated her birthday in October 2020 and broke the rule of six for her celebrations. Leigh-Anne is from High Wycombe, Buckinghamshire - and cites Mariah Carey as her biggest influence.