Shocking footage shows moment notorious red carpet crasher lunges for Ariana Grande as Wicked co-star Cynthia comes to rescue

Shocking footage has revealed the moment a fan vaulted over a barricade and ran at Ariana Grande during the premiere of Wicked: For Good.

The singer and actor was walking the red carpet and signing autographs for fans at the Universal Studios event in Singapore, when the man jumped over the barrier and managed to evade security.

He was able to reach the stunned 'No Tears Left To Cry' singer, who gasped as he put his arm around her. The interaction was quickly brought to an end by Cynthia Erivo who pushed herself in between Grande and the man.

He was then apprehended by security and escorted out of the event, while Grande appeared to be shaken up by the interaction.

Watch the shocking moment below:

The man has since been identified as notorious red carpet crasher Johnson Wen, who goes by Pyjama Man on social media, who has since confirmed that it was him in the clip.

"Dear Ariana Grande Thank You for letting me Jump on the Yellow Carpet with You," he wrote underneath a video of the moment shared on his Instagram account.

Wen has built a reputation for gatecrashing high profile events, previously forcing his way onto stage during Katy Perry and The Weeknd concerts.

The moment was poorly received online, with several commenters calling out Wen for his behaviour under the post.

The prankster grabbed the singer and began to jump up and down (Instagram/@pyjamamann)

Elphaba actor Ervio swiftly intervened (Instagram/@pyjamamann)

"This is extremely dangerous. Not sure why you would even do this," wrote one person, as a second commented: "This is so disrespectful."

"After all the trauma Ari has been through," added a third user, seemingly referencing the 2017 terror attack which occurred at the end of Grande's concert in Manchester, killing 22 concertgoers.

"This is beyond disrespectful Not just to her, but to the cast and to all the fans."

Grande, who plays Glinda in the Wicked films, has spoken openly about dealing with PTSD in the aftermath of the Manchester Arena bombing, which occurred just months after her former partner Mac Miller passed away from a drug overdose.

Cynthia Erivo jumped in to protect her co star (Suhaimi Abdullah/Getty Images)

"It's hard to talk about because so many people have suffered such severe, tremendous loss. But, yeah, it's a real thing," she explained in an interview with British Vogue in 2018.

"I know those families and my fans, and everyone there experienced a tremendous amount of it as well."

Grande went on to explain that she struggled to talk about the bombing without getting upset, adding: "I feel like I shouldn't even be talking about my own experience - like I shouldn't even say anything."