Austin, who lives in Bolster Moor with his husband Jake Lees, had his ups and downs in the house — from his adorable bromance with Apprentice contestant James Hill, to dramatic rows with housemates including Janice Dickinson and Farrah Abraham.
Austin in the Celebrity Big Brother house
The 27-year-old was also praised by viewers after shaving his head in solidarity with Gail Porter, a touching gesture where he told her she was an 'amazing person with or without hair'.
We've looked back on his time in the house and picked out some of his best bits.
Here's Austin's Celebrity Big Brother Highlights:
Austin makes his CBB debut
Austin entered the house as part of Team USA, as he is originally from Indiana — but he's also adopted Yorkshire as his home.
His arrival in the house left many viewers wondering who on earth he was — so we did a bit of digging.
We didn't have to wait too long for the drama to begin...
Janice called Austin a traitor for preferring the UK
Before he entered the house, the Katie Hopkins fan said he wasn't afraid to speak his mind and wanted to 'redeem gay American men' after Perez's controversial performance in CBB 2014.
And it took less than three days before his opinions got him into trouble — with Janice Dickinson branding him a traitor for saying he enjoyed living in the UK more than the US.
In an amazing show of solidarity with fellow housemate and alopecia sufferer Gail Porter, Austin shaved his head after becoming upset that Gail felt 'extremely ugly'.
He said: "Gail, I would be honoured for you to shave my head," he adds. "You are the most amazing person with or without hair."
And gave each other a friendly slap! (Image: Channel 5)
Warning: male nudity ahead!
One of Austin's lighter moments was when he and James Hill gave Sherrie Hewson a birthday treat in the Celebrity Big Brother house in the form of a saucy striptease!
The pair stripped bare - preserving their modesty with their hats - before giving each other a cheeky slap on the behind!
Austin was the only member of Team USA to make it to the final — but it was his best buddy James Hill named favourite to win.
Austin takes second place
BOREHAMWOOD, ENGLAND - SEPTEMBER 24: Austin Armacost and James Hill after the Celebrity Big Brother Final in Borehamwood, England. (Photo by Eamonn M. McCormack/Getty Images)
And the predictions were right! James Hill was crowned the winner in last night's final, but Austin made it into the final two with him.
