Three-time gold medallist Sir Peter Snell will be playing table tennis, having donated pieces of memorabilia to Te Papa earlier in the week.
Former Silver Fern captain Anna Stanley will play netball for the "T'Bags", named after late netball star Tania Dalton who tragically died in February.
Athletes range in age from 25 to 101-year-old Man Kaur, who has travelled from India to take part.
She will participate in the 100m, 200m, javelin and shot put.
With more athletes than the Olympics, the World Masters Games is the largest multisport event in the world. Almost 25,000 athletes from 100 countries will descend on Auckland for the 10 days of the Games, including more than 10,000 Kiwi competitors.
Beginning in 1985, the Games are held every four years, and this year's version will encompass 28 sports being contested at 48 venues across Auckland and Waikato. There is no admission charge for spectators to attend events at any of the venues.
Each of the 28 sports will offer both men's and women's competitions.
World Masters Games 2017 chief executive Jennah Wootten says Aucklanders are "in for a treat, with plenty of opportunities to be involved, even if they are not competing".
"Being great hosts and making visitors feel welcome creates a lasting impression that is great for our global reputation," she said.
"It's something the city did brilliantly during Rugby World Cup 2011. Thousands of visitors went home, raving about their experiences in our city and country.
"We're hoping the same will be true of the World Masters Games."
Age is the sole entry criteria competitors have to meet for most events.