Kristin Cavallari and Jay Cutler
Amelia J. Moore
06/12/2013 AT 09:00 AM EDT
Planning the perfect wedding day was a lesson in simplicity for Kristin Cavallari
"The flowers and everything were very simple but it was very warm and cozy," says the former star of MTV's hit shows Laguna Beach
and The Hills
, who married
Chicago Bears quarterback Jay Cutler on Saturday. "It was all about the lighting and the candles and the atmosphere was just so warm. It was absolutely perfect."
Opting not to see her groom before the wedding, Cavallari was nervous to walk down the aisle at Woodmont Christian Church in Nashville on Saturday, but the couple's 10-month-old son, Camden Jack
, paved the way for a smooth ceremony.
"We had two flower girls so one of them pulled him and our nephew in a wagon, and the other flower girl was throwing rose petals behind," Cavallari tells PEOPLE. "I obviously didn't get to see it, but everyone thought it was just the cutest thing. I can't wait to see pictures!"
After the couple's reception at a nearby historic warehouse – where guests dined on Southern comfort food and danced to a Motown band – the couple retreated to their honeymoon suite and gazed at the new rings on their fingers.
"We were both just like, 'I can't believe we did it!' " says Cavallari. "Especially Jay, because he's never worn a ring before. It's going to take some getting used to."
For more of our exclusive interview with Cavallari and all the photos and details from her Southern wedding, pick up this week's issue of PEOPLE, on newsstands Friday