Nothing L-Arg about him now! Slimline James Argent looks happy and healthy as he prepares to jet to Las Vegas for Mark Wright's stag do

Last year he was warned that he would be banned from best friend Mark Wright's wedding if he didn't clean up his act.

So it was no wonder James Argent beamed with joy as he headed to the airport to join in his pal's stag do on Tuesday.

The TOWIE star has overhauled his life following a stint in rehab for depression and drinking before Christmas after his family and friends begged him to seek help as his life spiralled out of control.

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Flying high: James Argent headed to Gatwick airport on Wednesday to head to Las Vegas for Mark Wright's stag do

Flying high: James Argent headed to Gatwick airport on Wednesday to head to Las Vegas for Mark Wright's stag do

After completing a 65 day programme, James, 27, has stuck to his word and cleaned up his act, as well as losing several stone in weight.

He showed off the full extent of his new healthy lifestyle as he arrived at Gatwick to meet up with Mark and his fellow stags.

The reality star looked slim and trim in a grey sweatsuit and grinned as he walked through the terminal.

He was greeted by Mark's rowdy group, which included the TV presenter's cousin Elliott Wright and dad, also called Mark, and ex-pop star Kenzie.

Thin and grin: The TOWIE star looked happy and healthy as he showed off his weight loss in a grey tracksuit

Thin and grin: The TOWIE star looked happy and healthy as he showed off his weight loss in a grey tracksuit

Missing Lydia? The 27-year-old looked like he was pondering something as he waiting to board his flight to Sin City

Missing Lydia? The 27-year-old looked like he was pondering something as he waiting to board his flight to Sin City

Let's go! The groom-to-be looked excited for his wild weekend as he arrived at the airport in a personalised T-shirt

Let's go! The groom-to-be looked excited for his wild weekend as he arrived at the airport in a personalised T-shirt

Boys on tour: The TV presenter, who will wed Michelle Keegan this month, was joined by a rowdy group of friends and family

Boys on tour: The TV presenter, who will wed Michelle Keegan this month, was joined by a rowdy group of friends and family

Meet you at the crossroads: Former Blazing Squad member Kenzie was also a guest on the stag do

Meet you at the crossroads: Former Blazing Squad member Kenzie was also a guest on the stag do

The stags were clad in 'The Wright Way' T-shirts in homage to the husband-to-be, who is set to walk down the aisle with former Coronation Street star Michelle Keegan later this month.

After his rehab stint, James admitted that Mark had given him an ultimatum; seek professional help or face being axed from his wedding's guest list.

Speaking to Now magazine, the crooner revealed: 'Mark told me I wasn't invited to his wedding - if I didn't change.

'But when I went into rehab, he got in touch because he was so proud of me.'

Big change: James was warned he was facing being banned from the stag and wedding by Mark unless he sought professional help last year. The reality star completed rehab and has since turned his life around, including losing several stone in weight

Big change: James was warned he was facing being banned from the stag and wedding by Mark unless he sought professional help last year. The reality star completed rehab and has since turned his life around, including losing several stone in weight

Fans of TOWIE have seen James completely turn his life around since he was allowed back on the show this year after initially being suspended in November for continually turning up to set late.

As well as getting help with his demons and losing weight, he has also won back his teenage sweetheart Lydia Bright, who has helped him keep on the straight and narrow.

After admitting cheating on the boutique owner with a string of girls, James insists that he's now ready to take their relationship seriously.

He told OK! magazine: 'This time it feels like a more mature relationship, we've both done a lot of growing up and I've learnt from my mistakes. I'll never take Lydia for granted again.'

Bliss: James is now back with his teen sweetheart Lydia Bright. The pair are showcasing their rekindled romance on the ITV reality show

Bliss: James is now back with his teen sweetheart Lydia Bright. The pair are showcasing their rekindled romance on the ITV reality show