The pair looked close as they posed for a photo in Alicante, Spain, where they attended Leah's wedding to her partner Chris Tayler on Thursday (17 July).
Arg, who invited Lydia as his plus one, looked equally happy to be sandwiched in between his former flame and his best friend Mark Wright - Marg reunited!
The group photo was posted by Mark's dad, 'Big Mark', who said: "All friends. #Marg & the girls."
What a glam looking quartet!
Viewers recently saw Lydia open up about her complicated friendship with Arg on Wednesday's episode of TOWIE, where she revealed to Ricky Rayment that there could be a future for the former couple!
Not only did Lydia say she would "love" to rekindle her romance with Arg without the "complications", but she also declared: "Who knows, in ten years time we might be married and have kids."
Meanwhile, Heart FM presenter and former TOWIE star Mark looked ever-so tanned, while his gorgeous fiancée Michelle Keegan stunned in a pretty blue dress with white embroidery.
Former Coronation Street actress Michelle glowed as she draped her arms around Mark - and no wonder - as she will soon be walking down the aisle when she marries him next year!
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Stars who married in 2014:
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