Sylvester Stallone taught Kate Moss rumpology at the weekend.
The 'Rambo' actor showed the British supermodel the art of bottom reading - a skill which allows the reader to predict a person's future by looking at their rear - and allowed her to practice by peering at his wife Jennifer Flavin's posterior.
Sylvester and Kate - who were both holidaying in Ibiza with British retail tycoon Sir Philip Green - also bonded over their shared love of singer Elvis Presley.
A source said: "I've never seen anybody get so animated over butts and Elvis as those two."
Sylvester's mother Jackie Stallone first perfected the art of rumpology, and Kate is keen to keep practising when she returns to Britain.
The source added to Britain's Daily Star newspaper: "She can't wait to get back home and read her boyfriend Jamie Hince's cheeks. Although she doesn't know how to broach the subject!"
The model is so thrilled with her newfound skill she has vowed to thank Sylvester by buying him a door from Elvis' Graceland home for him to use at his new £2.5million home in Lake Sherwood, California.