Tauranga bride-to-be Kerri Harnett's five children are scurrying around city stores to organise her a free wedding, thanks to the family winning MORE FM's Kids Choose the Wedding competition.

Invitations, hair, make-up and all the planned fuss of a couple's big day is being lined up by Kerri and her fiancé Andrew Berntsen's children, with their wedding set for September 12 at Bella Vista Lodge.

Kerri Harnett's and Andrew Berntsen's 19-year-old twins Jordan and Samantha Harnett, 19, with Bailey Berntsen, 12, choosing bridesmaids dresses for their mother.

Winning a fully-paid wedding and reception in front up to 50 guests, the couple's 19-year-old twin daughters Samantha and Jordan Harnett and 12-year-old sister Bailey Berntsen, Callum Berntsen, 9, Ethan Berntsen, three months, are all in on the planning action.

Kerri and Andrew, from the Red Team, were announced the winners last Friday – and the bride-to-be has been given no insight to her wedding day since.

'I've been given a timetable of where I have to have the children every afternoon,” says Kerri. 'It's basically drop them off and then go and sit in the car and butt out.”

Unlike most women before their wedding day, Kerri hasn't seen what she'll be wearing when she walks down the aisle – but she's not worried.

'I'm not too fazed really. I've stipulated I don't want a pink dress; I'm not really a pink person.”

The 38-year-old and her 40-year-old fiancé Andrew have been engaged for 13 years – and Kerri says their five children are happy to see their parents finally tie the knot.

'They're absolutely ecstatic. We've been engaged for 13 years – it's come up a number of times but when we told them we'd entered this competition they were getting right in behind it.

'They're going to be writing our vows apparently, so that's going be interesting.

According to Kerri, the couple would have set a date even if they didn't win the competition.

'Over the years we've wanted to give the kids security, so we've purchased our own house and there are things that come along that you think are more important – but this year makes it complete.

'We've gone about things really backwards but that's all right, we're happy with that. I think it's going to make the wedding a bit more special; the fact that the kids have so much more involvement.”