“When I won the world title, I am not going to lie, it was an unbelievable feeling. It was like a weight off my shoulders, a goal I'd set myself for so long and one others had talked about. When I got there I realised how I am never satisfied and how I always want more.”

British professional boxer

Callum John Smith is a British professional boxer. He has held the WBO interim light-heavyweight title since 2025, and earlier was a world champion at super-middleweight, with the WBA and Ring magazine titles from 2018 to 2020. He won both of those belts in the World Boxing Super Series, where he also claimed the Muhammad Ali Trophy. At regional level, he held the British and European super-middleweight titles between 2015 and 2017. As an amateur, he took silver at the 2010 Commonwealth Games. He is the youngest of the Smith brothers, alongside Paul, Stephen, and Liam, all of whom are professional boxers.