Jessica Wright, sister of Mark, led the arrivals and was first on to the sun loungers.
Earlier she was seen in a black bikini with her recently enhanced cleavage straining at the seams of her triangle bikini top.
After changing into a white bikini complete with matching cover-up, Jessica made her way back down to the pool where she was joined by friends including Lydia Bright and Lucy Mecklenburgh.
Essex hits Marbella: The Only Way Is Essex stars wasted no time in getting started on lapping up the Spanish sunshine.
Beautiful in brights: Lydia Bright looks great in her turquoise bandeau bikini as she suns herself
But while Jessica is undoubtedly in unbelievable shape, she has some competition from the rest of the TOWIE cast, who have all flown to Spain for a four-day break.
While Lydia looked fantastic in a strapless turquoise bandeau bikini, Lucy went for something even more eye-catching - an animal-print two piece.
But things weren't all fun and games for Lydia, as James 'Arg' Argent explained on his Twitter page.
He tweeted fans: '@LydiaRoseBright just got thrown in the pool with her clothes on by all the boys! She really aint impressed, Bad start to the Hol lol.'
And even the men were getting in on the sunbathing action.
Girls just want to have fun: Lucy Mecklenburgh goes for something even more eye-catching in animal-print
Toned: Both women look in incredible shape as they pose by the pool
While Jessica's brother Mark was spotted looking buff and bronzed in a pair of bright yellow shorts, Joey Essex oiled himself by the pool to ensure he made the most of his sunbathing time.
Wearing a pair of patterned swimming shorts, Joey kept his eyes tightly shut as he sprayed the oil on his face.
The lovable 'Arg', who has been trying to lose weight ahead of the holiday, is obviously still feeling insecure about his body and tried his best to remain unseen on his way to the pool.
White hot: The all-white beachside outfit highlighted Jessica's dark brown tan
Jessica had also felt insecure about her figure before she decided to have a breast enhancement operation earlier this year, taking her from a 32C to a 32DD.
She said after the surgery: 'I can't stop looking at my new boobs. I'm about 9st and 5ft 61/2in. I probably weigh more now, as my boobs weigh a pound each!'
Splashing around: Lydia and an unidentified friend enjoy a paddle in the sea as it heats up
Bikini babe: Jessica Wright shows off her newly enhanced cleavage in a tiny Lipsy bikini
And the rest of Jessica's figure also looked in great shape, as the reality TV star has been working hard on her body ahead of going to 'Marbs'.
Earlier this week Jessica took part in a Solero Explosions 90 calories boot camp with celebrity fitness instructor Mark Anthony to celebrate the launch of the new ice lolly.
Bronzed and buff: Jessica's brother Mark Wright is also in Marbella, and appears to have topped up on the fake tan ahead of his holiday
Here come the boys: Joey Essex oils himself for sunbathing while James 'Arg' Argent tries to hide his fuller figure
Had enough for one day? A worse for wear Joey Essex was escorted from the pool by a helpful pal, who then convinced him to down another drink, according to onlookers
Talking about her workout plan, Jessica said: 'All the TOWIE gang have been hitting the gym a bit more recently in preparation and there’s gonna be a lot of competition as the paps will be out to get us in our bikinis so we want to look our best!
'I hope everyone’s going to be jealous of my bikini body! I have been working out more and eating sensibly.
'I love Indian takeaways and a glass of wine, but I go for Tandoori prawns and sag paneer, No kormas or nan bread for me!'
Work and play: Lydia Bright's friend Ellie participated in a photoshoot for a jewellery company
Shaping up: Jessica has been working hard to tone up ahead of the break, and trained with celebrity fitness coach Mark Anthony earlier this week
Give me 10 more! Jessica took part in a Solero Explosions 90 calories boot camp to celebrate the launch of the new ice lolly-via Daily Mail