Chelsea Marriner is a dog handler and trainer from New Zealand. Marriner was born and raised in Rotorua, in the North Island of New Zealand. When she was 7 she started competing in agility events and at 10 was a winner in the SPCA Animal Ark Young Animal Carer of the Year. In May 2010, aged 18, she represented New Zealand at the World Agility Championships in Britain, winning a gold medal in the individual jumping event with a dog borrowed from a local owner. In 2018 she was selected for the Paw Blacks team to represent New Zealand at the Australian Agility Nationals in Melbourne, Australia.