Getty Images | Jacopo Raule

Justin Timberlake And Jessica Biel Had A Prankster Jump On Them

Between the paparazzi and stalkers, the last thing celebs need is a prankster whose life joy is harassing them.

But sadly, Vitalii Sediuk, the famous prankster, just won't quit. His latest victim was Justin Timberlake while the star was at Paris Fashion Week.

Vitalii Sediuk, the famous prankster known for ambushing celebs, is at it again.

Instagram | @justintimberlake

This time, he was hot on the heels (literally) of celeb couple, Justin Timberlake and Jessica Biel.

The "celebrity news reporter" has crossed boundaries with numerous celebs many times before.

Instagram | @vitaliisediuk

For example, in 2011, after singer Madonna had publically expressed her distaste for hydrangea flowers, what does the prankster do?

He hands her a bouquet of hydrangeas at the Venice Film Festival.

Then, in 2012, he completely crossed the line by trying to kiss Will Smith while he was on the red carpet for his film Men In Black III.

Smith retaliated by slapping Vitalii across the face — something that caused an eruption of cheers.

Unsurprisingly, that wasn't the only time Vitalii got hit by celebs for his antics.

Back in 2013, he was elbowed in the face by Gigi Hadid after he grabbed and lifted her off the ground at Milan Fashion Week.

Gigi was so offended by what had happened, and even more so when news sites tried to say that *she* attacked him.

She also tweeted: "and had EVERY RIGHT to defend myself. How dare that idiot thinks he has the right to man-handle a complete stranger. He ran quick tho."

One time he broke Brad Pitt's glasses while at the LA premiere of "Maleficent."

Getty Images | David Buchan

This led to a restraining order from the actor.

Not to mention, he's tried — and failed — twice to kiss Kim Kardashian's butt.

All of these disturbing antics have led people to question whether he's pranking celebs or just straight-up assaulting them.

For instance, he once put his face into Leo DiCaprio's groin while "pranking" him in 2014.

Sadly, not much has been done in the past about the Ukrainian reporter's behavior.

Not much legally, anyways.

He was once fired from his reporting job in 2014 for diving under America Ferrera's dress.

He was also once banned from the Oscars for six months after crashing Adele's acceptance speech.

Instagram | @vitaliisediuk

That ban didn't do too much, though, since the prankster managed to sneak in the very next year.

Now, the latest celebs targeted by Vitalii are Justin Timberlake and Jessica Biel.

Instagram | @justintimberlake

The ambush took place at the Louis Vuitton Paris Fashion Week show.

Timberlake and Biel were just minding their own business, making their way down the red carpet when the prankster grabbed onto Justin's ankle and wouldn't let go.

Getty Images | Marc Piasecki

Security intervened quickly and then Biel and Timberlake continued on their way.

Thankfully, Timberlake had the last laugh as he had a hilarious response to the whole thing.

He posted this image on Instagram, along with the witty caption.

"Last night at @louisvuitton. Human anklet not included. Congrats on the collection @nicolasghesquiere!" he wrote.

While the couple are laughing things off now, at the time, a source told "E!" that they were both "shaken up."

Getty Images | Jacopo Raule

"[They] were understandably shaken up and startled after this stranger jumped out at them," the source revealed.

"Once inside, Jessica was comforting Justin and rubbing his shoulder."

Thing is, Vitalii doesn't see himself as "attacking" celebs.

Instagram | @vitaliisediuk

After his run-in with Timberlake, he even posted a defense for himself on Instagram stories.

He wrote: "Before media says that my prank was an "attack" (as always), I want to explain what attack means."

Instagram | @vitaliisediuk

He recalled how he and his friends were "attacked and injured by an aggressive homophobe at a gay beach in Kyiv."

He finished by advocating for LGBTG rights. "I hope now something will change to LGBTG community in my country and all over the world feels safe."