Pregnant Margot Robbie and Tom Ackerley enjoy most exclusive party in the Med as they holiday with Gigi Hadid, Bradley Cooper and Benedict Cumberbatch on $250M superyacht

Margot Robbie, Gigi Hadid and Bradley Cooper were among those invited to the most A-list party in the Mediterranean as they holidayed together this week.

The Hollywood elite proved the most exclusive gathering this summer was hosted at sea, as they kicked together back on a $250M superyacht with their children.

Pregnant actress Margot, 34, who is expecting her first child with her husband Tom Ackerley, hung out with fellow celebrity power couple Gigi and Bradley.

Joining the group of glitterati was fellow actor Benedict Cumberbatch, who was also spotted aboard the luxury vessel, which is known as Multiverse.

Multiverse is a 350ft (116m) yacht which was launched by from Kleven Maritime AS from Norway in 2018 and is thought to be the 50th biggest yacht in the world.

The yacht can cater for up to 30 guests in 15 cabins, while also being capable of carrying up to 36 crew onboard to ensure a relaxed luxury yacht experience. 

At one point away from the group, Gigi and Bradley were spotted sharing a few affectionate moments while cozying up on one of the decks on the spacious yacht.

The pair - who were first romantically linked last year in October - embraced and also kissed while underneath a shady area. 

The stars also held a lighthearted conversation as the Silver Linings Playbook actor sipped on a warm drink. 

Gigi sported a stylish orange bikini for the day on the water, and when she wasn't taking a dip, the beauty layered the swimsuit with a semi-sheer, white coverup. 

Her short, blonde locks fell down naturally to nearly brush the tips of her shoulders, and she also opted for a pair of fashionable shades. 

Bradley also kept it casual by wearing a sleeveless, grey shirt as well as a pair of dark green swim trunks. 

He was also accompanied by his seven-year-old daughter, Lea - whom he shares with ex and supermodel Irina Shayk. 

On Thursday, the couple reached a milestone in their relationship when Gigi was spotted for the first time with Lea as they touched down in Sardinia - with the actor's mother Gloria also joining the group.

They stepped out of a sleek, black SUV together after arriving to the island of Palmarola on a private jet. 

At the time, Margot was seen already spending time on the lavish yacht with her husband, Tom. 

She showed off her baby bump in a black bikini - after it was confirmed last month that the pair are expecting their first child together. 

And on Saturday, the Barbie actress was spotted once again as she joined Bradley and Gigi on the large boat. 

The mother-to-be showcased her burgeoning stomach in a black bikini top as well as a short-sleeved, black outer piece that was unfastened at the front. 

Her blonde locks were parted in the middle, and effortlessly flowed down past her shoulders in light waves. 

On one of the upper decks of the yacht, Hadid and Robbie were seen talking, while Bradley and Tom sat nearby. 

Later in the day, the group ventured off the yacht and some had a blast on a speedboat on the water. 

Hadid also wore a life vest and afterwards, stepped underneath an outdoor shower alongside Bradley. 

Cooper enjoyed solo time as he got a bit exercise on a canoe and paddled his way to a sandy shore where he also took a quick dip.