A video posted on website TMZ.com shows a man grabbing Hadid from behind and lifting her off the ground as she and her sister, Bella Hadid, exited the venue of the Max Mara runway show Thursday morning. Hadid reacted angrily, wriggling out of his grip, saying "Let go of me!" followed by expletives.
A bodyguard took her arm as she began to go after the assailant and helped her into the car, where the model told someone "go find that guy."
In an email to The Associated Press, Vitalii Sediuk confirmed that he had lifted Hadid off the ground, saying it was a form of protest against the use of celebrity models.
"While I consider Gigi Hadid beautiful, she and her friend Kendall Jenner have nothing to do with high fashion," Sediuk said in the emailed statement. "By doing this I encourage fashion industry to put true talents on the runway and Vogue covers instead of well-connected cute girls from Instagram. You can call it a manifest or a protest."
He said he also objected to having the Kardashians featured in Vogue magazine.
Kim Kardashian has been a previous object of Sediuk's uninvited attention. He caused her to stumble briefly in Paris when he provoked a kerfuffle at a fashion week event two years ago. Sediuk previously spent two days in jail after jostling with Brad Pitt at a Los Angeles film premiere, and he crawled underneath America Ferrera's dress at a film premiere at the Cannes festival.
Police in Milan could not immediately confirm whether any complaint had been filed in the incident.
Hadid, several hours after the incident, appeared in perfect form on the Fendi runway.
By Colleen Barry.