Big Brother evictee Sarah McDougal enjoys a low-key date night with boyfriend Nathan Hargrave

She’s gearing up to go head-to-head with her former rivals at Big Brother’s live finale this Wednesday night. 

But Sarah McDougal, 19, looked anything but stressed as she stepped out for date night with her boyfriend Nathan Hargrave on Saturday.

The pint-sized reality star appeared to be in good spirits as she and her man picked up some groceries at a supermarket in Sydney. 

Looking relaxed, the couple merrily chatted away as they carried their new purchases down the sidewalk.  

Sarah looked trendy in a denim jacket and black mini-dress, which she matched with a pair of black boots and striped socks. 

She completed her winter ensemble with a checked brown-and-white scarf. 

Sarah showed off her natural complexion, opting for little makeup for the occasion and she wore her caramel coloured hair into a ponytail.  

Meanwhile, Nathan wrapped up from the cold in a Kathmandu thermal jacket and a red-and-white hoodie. 

He completed the look with black skinny jeans, white sneakers and striped socks.   

Speaking to Daily Mail Australia on Monday, Sarah said she expects the reunion to be ‘a bit hectic’, as some stars compete for their final moment in the spotlight.

‘I think some of the people who left earlier on in the series are going to try and blow it up to get their 10-seconds of fame,’ Sarah said.   

The army cadet said while the live finale should be a celebration and recognition of the final three, she’s ready for the unexpected.

‘I’m trying to roll with the punches. If someone has something to say, I’ll definitely say something back. I’m just keen to celebrate the final three,’ Sarah said. 

 Big Brother Australia continues Tuesday at 7:30pm on Channel Seven