The TOWIE co-stars were en route to filming at Cavalli nightclub but couldn't resist stopping for a quick kiss outside in front of the photographers.
So loved up!
Lydia and Arg are the current cover stars of Reveal magazine, and in their interview, they tell us how they're happier than ever before.
Viewers of TOWIE know it hasn't been an easy road to happiness: Arg entered rehab last year to deal with his excessive partying and previously cheated on Lydia before they got back together.
Now, however, he's cleaned up his behaviour and is looking better than ever, and everything seems great between him and Lydia.
So great, in fact, that a proposal doesn't seem too out of the question.
Lydia told us: "It's not too soon for him to propose – I met him eight years ago! It's something we know is going to happen, he's probably just waiting for the right time."
Ah! A TOWIE wedding! Let's hope if that proposal does happen, the big moment is filmed – and the wedding is televised, too!
Arg's transformation: then and now