Earlier today, Mark joined 38 of his family and friends at the airport to jet off on his stag do and to say the former TOWIE star and his pals are excited is an understatement.
Boarding the plane, Elliott grabbed his little cousin for a quick snap and the pair look super-keen to make their way to Sin City...
Clenching their fists for the camera, the Wright boys pull their best excited faces (although Elliott does look slightly scared in his!) as they prepared for take off.
And despite the no doubt raucous do they have planned ahead of them, Elliott made sure to reassure Mark's wife-to-be she shouldn't be worried.
Alongside his photo of himself and Mark, he said: "Don't worry @michkeegan his in safe hands... I promise to look after him.... #Honest."
Although his inclusion of a laughing emoji in his caption suggests his offer isn't as sincere as it seems. Uh-oh!
Joining Mark for his pre-wedding celebrations along with Elliott, are his dad, his brother Josh, Big Reunion star Kenzie and his BFF James 'Arg' Argent.
Ahead of his trip, Mark enjoyed a pre-stag do in his hometown Essex, partying at his local haunt Faces nightclub.
Elliott's latest Instagram post comes after he told fans how much he was looking forward to his stay in Vegas last night.
Excited to toast Mark before he becomes a married man, the dad-of-two said: "So the count down [has] started... In a few hours the journey begins... 38 of us ready to make my little cousin @wrighty_ stag... A few days to remember...! #VivaLasVegas."
We've no doubt the boys will have a lot of fun together!
Mark and Michelle are set to wed very soon, hosting 200 guests for their big day. As well as finalising the plans for their nuptials, Michelle recently enjoyed her own hen celebrations, jetting to Dubai with a 30-strong bridal party.
And after returning home recently, Michelle revealed her hen do had given her a three-day hangover.
Still, at least she now has a few days to herself to recuperate!
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All you need to know about Mark Wright and Michelle Keegan: