Chef Travis McAuley also uploaded a photo of the festivities which showed George surrounded by friends, including MasterChef co-judges, Matt Preston and Gary Mehigan, and Aussie chefs Matt Moran, Shannon Bennet, Miguel Maestre and Manu Feildel.
According to the Greek City Times, the reception was held at the Island Athens Riviera, which overlooks the Meditteranean sea.
George shares two children with Natalie, a seven-year-old son named James and five-year-old daughter named Michaela.
The 39-year-old opened up to the Herald Sun in June about his upcoming nuptials, saying: 'I’m very privileged and lucky to have beautiful and healthy children, and Natalie has been an incredible backbone in everything in my life. She’s had to put up with a lot with me. I’m a very lucky man.'
He added: 'It’s going to be an exciting day when it comes along. It’s a seal of commitment...Actually, let me rephrase that — it’s a great opportunity to have a party!'
This article originally appeared on WHO.