Last year they spent time apart while Nukunuku, 32, played semi-professional in Japan and Stockford, 24, played professionally 9000km away in Italy.
But distance made their hearts grow fonder and Nukunuku proposed during that time.
Last October, the couple were sitting in a ferris wheel overlooking a Japanese amusement park when Nukunuku got on to one knee. "She had no idea, she just cried," he said.
About 170 guests will join them at Otaki Beach before celebrating at the Cosmopolitan Club in Levin, where Stockford's family live.
Stockford will forgo her dedication to the colour white for just one day to wear a strapless, ivory A-line dress.
"I'm feeling a bit nervous but I know this is right for me," Stockford said.
Both played in the National Fastpitch Championships this week, and Nukunuku hoped to be named in the Black Sox team to be announced today.
Other events on Dec 12
• The sixth annual World Hoop Day
• I Have a Dream graduation at Eden Park, Auckland
• The Concert for Sandy Relief at Madison Square Garden in New York
• Divine healers at the Tamaki Yacht Club will mark the start of 2000 years of peace
• Official opening of Doha International Airport in Qatar