The party was organised by Audrey's 15-year-old daughter, Georgia, who urged everyone to dress in the colour they expect the baby to be.
"Today my magnificent stepdaughter Georgia arranged a truly fabulous Baby Shower / Reveal event at the Bronte SLSC down the road," Osher, 44, wrote, in a post to his Instagram.
"Because G wanted to get a read of the room, we were all encouraged to wear the colour that showed which way we thought the result would go," he continued.
"Seems wifey and I got it wrong," Osher explained, showing that he and Audrey were wearing pink.
"Turns out that twelve weeks ago, the envelope that we were given after our Harmony Test, which G has kept secret this entire time (as much as we tried to trip her up looking for pronouns and slip-ups, she was a vault!) shows that the baby growing within Audrey indeed has XY chromosomes," he said.
Yep, it's a boy!
The couple were clearly surprised by the gender of the baby, but still VERY happy.
"Another new human joins us in this human race in only a few weeks time.
"No matter who this human is, we will love it with all our hearts," he wrote.
Congratulations!
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