But while Arg is proud of his weight loss, we assume he still felt understandably intimidated next to his gorgeous girl - who was voted TOWIE's top bikini bod by our readers last year - he appeared to suck in his tum on the beach!
These exclusive pics, taken at the exclusive Waldorf Astoria at The Palm hotel, show off Arg's four months of hard work, in which he's slimmed down from 18st 5lb to 14st 5lb.
And Lydia, 25, is clearly smitten too. She was snapped caringly rubbing sun cream into his back and playfully splashing him in the sea.
When the loved-up couple weren't holding hands on a romantic stroll along the beach, they were passionately kissing on the beach.
Last week, Lydia said in an interview that she was proud of Arg and his recent weight loss, and she revealed how she has been surprised by his new transformation.
While Arg, 27, is looking great with his healthier figure, he isn't done with the weight loss just yet.
Arg is looking to continue his healthy fitness regime and is hoping for a six-pack in the summer.
It was a loved-up series finale for the couple last month, as childhood sweethearts Arg and Lydia rekindled their romance, insisting that this time would be forever.
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