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He became an adult last month when he turned 18 in the company of his famous parents.   And on Saturday Romeo Beckham put on a loved up display in a sweet Instagram post with his girlfriend

Mia Regan as the couple marked a year and a half together. In the snap, Romeo sports a black hoody and edgy silver ring in his ear, as he faces Mia, 17, and clutches her face in his hands.

Mia meanwhile sports a retro knitted jumper, orange aviator shades and an elegant gold chain.  The chemistry between the stylish duo is palpable as she closes her eyes and faces towards her

beau.  RELATED ARTICLES Referring to his model girlfriend's unusual blue pony tail accessory, Romeo captioned the post: 'Love you :) x (nice blue hair thingy)'.   Taking to

his story, Romeo shared another snap of himself and Mia, this time of duo standing cheek to cheek with Mia's arm around his shoulders in an embrace. Revealing why he was sharing the

images on this particular day, Romeo captioned the story: 'YEAR AND A HALF WITH THIS WEIRDO... LOVE UUUUU'.    The couple have been dating since May last year and back in July

enjoyed a romantic break in Cornwall as well as a trip to Puglia, Italy with the whole Beckham clan. Last month Mia joined the likes of Victoria, 46, David, 45, Brooklyn, 21, and Cruz, 15,

to mark Romeo's 18th birthday. Alongside the sweet photographs from various holidays, Mia told Romeo she 'loves him so much'. In one photo the couple beamed for the camera as

they soaked up the sun on the beach, while in another Mia planted a kiss on his cheek. Another snap showed Romeo cuddling his younger sister Harper, nine.  Mia wrote: 'Happy 18th my

gorgeous boy man!!!!! You have the most beautiful soul and deserve everything. YOU MAKE EVERYONE SMILE AND I LAVAAA YOoU SO MUCH' (sic). Romeo replied with love heart emojis. Romeo

enjoyed a rainbow cake with his siblings in a sweet snap shared by mum Victoria, as they celebrated his 18th birthday with a low-key party