Nicole 'Snooki' Polizzi will marry in front of 500 guests this weekend.

The former 'Jersey Shore' star will tie the knot with Jionni LaValle - who she got engaged to in March 2012 - at St. Rose of Lima in New Jersey at 3pm tomorrow (29.11.14) followed by a reception at the nearby Venetian, and the couple will have their kids Lorenzo, two, and Giovanna, two months, playing key roles in the ceremony.

A source said: ''Both kids will be a part of the ceremony in some way.''

The 27-year-old reality star is planning to wear two dresses, while Lorenzo will wear a white tuxedo and Giovanna will have a gown to match one of her mother's.

The source said: ''One is traditional and one is for the reception. Both are Gatsby-inspired with two different headpieces from Bridal Reflections.''

And Snooki is said to be excited to show off her post-baby body.

The source added to the New York Daily News newspaper's Confidenti@l column: ''She's at her goal weight -- very excited to show herself off.''

Joining the couple's children in the bridal party will be a number of Snooki's 'Jersey Shore' co-stars, including Jenni 'JWoww' Farley.

The insider revealed: ''All of the 'Jersey Shore' girls are in her bridal party, which has like 15 girls in.''

However, there was no space on the guest list for Snooki's former boyfriend and co-star Vinny Guadagnino or Mike 'The Situation' Sorrentino, who is currently awaiting trial for tax fraud.

The source said: ''Everyone was invited except for Vinny and Mike. She pretty much can't stand Vinny.''