The couple, parents to two-year-old son Brody, confirmed the surprise news in an Instagram post on Sunday morning and admitted they were keen to marry before the end of the year.
Sharing a photo taken shortly after the service, Georgia, 32, and Tommy, 31, in a joint post wrote: ‘1st December… we done a thing.
‘After a challenging year. We decided we wanted to end the year happy, in love & together as husband & wife/ Wedding part 2 coming soon.’
Georgia also confirmed the second part of their wedding, understood to be a larger ceremony, will take place in Spain.
Happy news: The Only Way Is Essex stars Georgia Kousoulou and Tommy Mallet have announced their marriage – two days after exchanging vows in a private wedding ceremony
Their former TOWIE co-stars flooded their comments with sweet tributes congratulating the newlyweds.