Bradley Cooper's leading lady posted several funny pics on Instagram showing the models hanging out together and getting fairly up close and personal.
In one shot, Waterhouse shows off some serious under boob in a monokini while Delevingne pretends to lick her underarm.
Waterhouse cleverly captioned the photo, "Pitwash."
And in another pic, the two were snapped snuggling up and wrapped in each other's arms.
Delevingne didn't miss an opportunity to make a funny face and stick out her tongue, yet again!
"Shugapoo," Waterhouse affectionately dubbed the famous model.
Meanwhile, Delevingne posted a pic of her butt in a lace skirt and wrote that she was on set for an upcoming Burberry shoot in Shanghai. And considering that Waterhouse is also a face for the brand, that's most likely what these two were up to.
Clearly these ladies are enjoy their time together whether it's for work or play!