Friends and followers gushed over Anna's stunning photo, remarking that she looks as amazing as ever.
"Looking good mummy. Pregnancy suits you indeed, I do same with selfies too," one noted.
"Embrace it - you’re growing a little human in there - that’s amazing," wrote another.
One even said: "Wish I had looked that in the third trimester. I was more like a beached whale who spent all their time in the bath tub trying to cool down."
But Anna kept it real and shared an insight into her pregnancy, confessing: "They're all the other 633 pics of me."
Dad-to-be Tim recently shared an intimate photo of Anna's baby belly following his recent arrival back in Sydney.
"Best way to start my day! Would not miss this for the world! Human touch is a powerful thing," Tim wrote in his caption, before adding, "My little girl is doing somersaults and a few muscle-ups in there... #CirqueduSoleil2040 #Home."
Tim, who was previously based in Melbourne while filming Neighbours, made the tough decision to move back home to Sydney to be closer to Anna in her third trimester.
Anna and Tim chose to stay at boutique bed and breakfast Blackbird nestled in the northern New South Wales hinterlands.
The luxury accommodation boasts a 10-metre magnesium infinity pool, views of Cape Byron and the Pacific Ocean plus guests are treated to champagne on arrival and complimentary artisanal local produce in their room. Fancy!
"Getting out of a Sydney is a luxury these days and i’m certainly not taking it for granted. Good to finally spend time with my hubby," Anna remarked on Instagram, sharing a photo of the stunning holiday destination.
