Olivia "Livvy" Breen (born 26 July 1996) is a Welsh Paralympian athlete, who competes for Wales and Great Britain mainly in T38 sprint and F38 long jump events. She qualified for the 2012 Summer Paralympics and was selected for the T38 100m and 200m sprint and was also part of the T35-38 women's relay team. She has also represented Wales at the 2014, 2018 and 2022 Commonwealth Games winning gold in the F38 Long Jump in 2018 and gold in the T37/38 100m in 2022 .