Heading up North for a few days away together, Lydia made sure to take a selfie with her co-star boyfriend as they settled in for their train journey.
Don't they just make the perfect pair?!
Taking to Instagram, Lydia shared her photo of herself and Arg with fans, revealing the pair had an "exciting couple of days" ahead of them.
Oh Lyds, you tease! We wonder what they could be getting up to...
In her snapshot, Lydia can be seen rocking her blonder and shorter new 'do while cuddling up to Arg and of course, the Essex beauty made one stylish traveller.
Dressed in a white blazer and matching top, Lydia sported perfectly coiffed locks and perfect make-up, resting a pair of aviator shades on her head. Arg, meanwhile, kept things casual in a dark grey jumper and is pictured smiling from ear to ear next to his girlfriend.
Despite keeping their romance on the down low since TOWIE wrapped up last month, the childhood sweethearts can't hide the fact they are completely smitten with each other. So much so, that they've both been spotted admiring each other on social media recently.
Over the weekend, Lydia looked ultra-glam as she attended The Asian Awards and on seeing a photo of her all dressed up at the event, Arg couldn't resist tweeting: "Wowza!...Hurry up and get home, I'm waiting! Haha @LydiaRoseBright x."
Lydia soon returned the favour by posting a photo of Arg looking very dapper to her Instagram page, along with a trio of heart-eyed emoticons.
On seeing her post, Arg then tweeted: "Do I scrub up well!? Haha @LydiaRoseBright Your making me blush! X."
Do I scrub up well!? Haha @LydiaRoseBright Your making me blush! X— James Argent (@RealJamesArgent) April 19, 2015
On/off couple Lydia and Arg decided to get back together during the season finale of TOWIE last month.
Finally giving in to their feelings for each other, Lydia asked Arg to give her a list of all the people he had cheated on her with and those he had been with since. Explaining she didn't want anymore secrets between them, Lydia then said she was willing to give their romance another go.
The pair then agreed to wipe the slate clean, sealing their reunion with a kiss. Insisting this time their relationship is forever, the pair are now even talking marriage.
While Lydia has told Arg he is 'The One', Arg has said he thinks he and Lydia will have a very happy future together.
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TOWIE: Who's hooked up with who?