Arg turns 28 today (5 December) and Lydia couldn't resist getting sharing some hilarious old snaps of the couple in a Flipagram slideshow.
Proving just how long they've known each other, the photos show the pair right at the beginning of their relationship. We couldn't resist having a giggle at their young faces and dodgy teen fashion. Also, check out Arg's hair 'do!
Along with the post, Lydia added a touching message, writing: "Happy Birthday to my best friend, my soul mate, my Argy. @real_arg Who would have thought seven years ago when we met, that we would be where we are today. I pinch myself everyday at how lucky we have been in life.
"We have had many ups and downs but what hasn't killed us has made us stronger. I am so beyond excited for our future. I will love you until the day my heart stops."
Seriously, could these two get any cuter?!
On the last series of TOWIE, Lydia and Arg's relationship went through a difficult patch, but by the end of the season they'd sorted things out. In fact, things are so good that co-star Georgia Kousoulou recently tweeted that she predicts an engagement will soon be on the cards - eek!
Arg's best friend and former TOWIE star Mark Wright also took to social media to send a special message to Arg, tweeting: "Happy birthday to the man @RealJamesArgent although you get on my nerves sometimes, I can't not love ya!! Have a good one pal."
No doubt there will be some celebrations in Essex tonight!