When Shortland Street's Rawiri Jobe and Nivi Summer were told that one in five teens have disabling hearing loss, the stars jumped at the chance to dust off their running shoes.
They'll be part of the National Foundation for the Deaf and Hard of Hearing team in this year's Ports of Auckland Round the Bays.
"This is my first time, so I am excited… but a little nervous that I might not last the distance," Summer tells Spy. "I'm just going to stay hydrated, have fun and make it to the finish line. It is all for a good cause after all."
The World Health Organisation predicts the number of teens who will develop hearing loss will double over the next 30 years.