The reality TV stars – who met in the villa this summer – dressed up in Bavarian beer girl costumes for the event in Stratford, East London, last night.
The pair messed around on the dancefloor as they posed with beer steins for the cameras at Erdinger Oktoberfest.
It was thought they'd had a fall out since starring in the hit ITV2 dating show, with Rosie admitting it was a "sore subject".
Viewers' hearts were melted by their friendship on Love Island after Rosie slept outside with Georgia when she was dumped by ex Josh Denzel.
But they appeared to put any bad feeling behind them as they enjoyed a boozy night together.
Georgia left boyfriend Sam Bird at home while she had fun on the girls' night.
The pair are still going strong after falling for each other in the villa.
They came under fire for choosing to split in a bid to stay in the show – but soon saw sense and reunited.
Ever since they have been seen beaming as they remain one of the few couples to stay together.
Laura Anderson and Paul Knops, Ellie Brown and Charlie Brake and Samira Mighty and Frankie Foster have all broken up.
Ellie dumped her millionaire boyfriend Charlie after discovering he was dating another woman behind her back.
The distraught Geordie caught out super-rich Charlie after a number of fans spotted him romancing a mystery blonde at London restaurant Zuma.
He had told Ellie he was at his mum’s house in Kent, but that was a lie.
Winners of the fourth series Dani Dyer and Jack Fincham are still going strong – as well as Josh and Kaz Crossley.
The only couple still together since last year's third series is Camila Thurlow and Jamie Jewitt.
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