"Meet Mr and Mr Kerr Through the universal power of love that is and surrounds all of us, yesterday @mattykerr26 @jimmykerr2611 were married in front of 284 of their much loved and treasured family and friends in Australia," Therese captioned a photo of her son and his partner.
"Even though Australia with its archaic beliefs does not yet recognize same sex marriage, in our eyes, in the eyes of Matty and Jimmy's family and friends and by the law of the universe that overrides all," she continued.
"Matty and Jimmy are married and have started a new and beautiful life together. We don't need an Australian Government or a law to tell us what love is or isn't. #loveisourboys Love you both #mattyandjimmy #lovewins #wedecidedonforever".
Sharing another photo of the bridal party, Therese wrote: "This is how beautiful @mattykerr26 and @jimmykerr2611 wedding was 🙏💛❤️🎉💃🎁🍰 #lovewins".
Miranda and Spiegel became engaged in July last year, announcing the happy news with a Snapchat filter.