Justin Timberlake and Jessica Biel were attending Paris Fashion Week when a crazed fan attempted to tackle Timberlake.

The incident took place outside Louis Vuitton's fashion show where paparazzi and fans alike were waiting for guests' arrivals.

Celebrity prankster, Vitalii Sediuk, grabbed Timberlake's leg after he stepped out of his car. Biel was holding her husband's hand when she realized something was wrong and looked back to find security guards trying to pull the fan off of Timberlake's leg.

Sediuk has previously pranked and attacked stars including Kim Kardashian, Bradley Cooper, Will Smith, Ciara, among countless others. He even managed to get on stage during the 2013 Grammy Awards when Jennifer Lopez and Pitbull were attempting to give an award to Adele, security quickly stepped in.

"Justin Timberlake and Jessica Biel were understandably shaken up and startled after this stranger jumped out at them," a source told E! News. "Once inside, Jessica was comforting Justin and rubbing his shoulder. Security from the event also checked on Jessica and Justin to check that they were okay."

Watch the crazed fan attack, Timberlake, below!

20 Celebrities With Horrifying Stalker Stories

More From 98.1 KHAK