Lydia shared the picture with fans last night (19 June) and it shows her frolicking in the waves during the cast's recent trip to Marbella, Spain.
The reality star and fashionista is wearing a gorgeous halter-neck one-piece in the shot, which shows off her natural curves in all their glory.
Alongside the photo, which Lydia posted on Instagram, she said: "Wave after wave. #TOWIM #PHOTOSHOOT."
At the end of the last series, Lydia made a shock return to TOWIE after deciding to make a comeback to the show.
Along with her cast mates, Lydia has since spent 10 days filming a two-part Only Way Is Marbs launch special and will feature in the rest of the new series too.
During her time in Marbs, Lydia was pictured having dinner with her ex-boyfriend James 'Arg' Argent, however he has since confirmed that it was simply a meal between friends.
Speaking to us yesterday, Arg told Reveal: "I wouldn't call it a date. I think it was just two old friends clearing the air and just speaking."
Meanwhile, Lydia showed off her beach body earlier this week, alongside Jessica Wright, Danielle Armstrong, Ferne McCann and Chloe Sims, in another TOWIM promo shot.
The Only Way Is Marbs, 10pm, ITV2, Sunday 22 June
Watch the TOWIM trailer here: