The reality stars headed to the Lotus Chinese Floating Restaurant in Canary Wharf, London for Leah's pre-birthday meal on Sunday night (1 February).
The occasion was a good catch-up for Arg and Elliott, who posed for a photo together at the table. Elliott said: "Love this boy!!! @RealJamesArgent."
Family friend Arg replied: "@elliottwright_ How I've missed the Wright family get togethers! Happy Birthday @leahwright_ x."
Leah, whose Spanish wedding to Chris Tayler was filmed on TOWIE in July last year, looked stunning in a bright red frock. Captioning a photo of himself and his sister, restaurant owner Elliott said: "Lovely birthday dinner for my big sis @missleahewright."
Arg has recently returned to Essex following a trip to Los Angeles and Las Vegas. On his return, Arg headed to his local barbers in Loughton, and he seemed pretty chuffed with his haircut!
In October last year, Arg was suspended from TOWIE. The 27-year-old spent the festive season in a rehab centre and returned to Essex just before the New Year.
Showing off a new trim figure and looking positively towards the future, Arg told fans in December: "It's good to finally be back in Essex. Home is where the heart is. New year coming up and a new start."
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