Gemma Louise Ruegg (born December 24, 1984), also known as Gemma Hewitt, is a British female boxer and business owner from Bournemouth, Dorset.

After suffering mental health difficulties and alcohol addiction in her youth, she took up sport on the advice of her family doctor. She went on to become the first female boxing champion at two weight classes in the QBL^[1] after winning the regional welterweight title, ten weeks after giving birth to her sixth child.

Her trainer is husband Danny Ruegg, and her son Mace is also a professional boxer.

In 2016 she formed the fitness apparel clothing brand Combat Dollies, where she serves as director.

From the age of 16, Gemma had an alcohol addiction and suffered with depression and self-harm. When the family doctor advised her to join a gym, Gemma took up boxing as a source of focus, it turned her life around. She said:

My doctor kept saying: 'join a gym, it will do you a world of good'. I think now he probably meant a Fitness First type gym but I joined a boxing gym instead. Before I joined the boxing gym, my life was on the way to a train wreck… I was lost. Boxing gave me goals. It's given me something to be good at. I don't think I would have found what I found in boxing anywhere else.

She married Danny Ruegg in 2016 and has seven children; she also has 5 step-children. Following her doctor's guidelines, she trained throughout her pregnancy^[2] and regularly takes her children with her to the gym.^[3]

In 2016, Gemma set up the fitness apparel clothing brand Combat Dollies. She stated:^[8]

When I first started training in the gym I couldn't find any clothing that fitted. It was either too baggy, like men's clothing, or too tight and not flexible enough for women to wear. So I made clothes that I was happy to wear at the gym. Then I made some for my friends and then their friends and it grew from there."

Her gymwear has been featured in the 28th season of the TV show The Ultimate Fighter,^[9] worn by Invicta fighting champion MMA fighter Pannie Kianzad.

She is the sole director of the company.