Sydney Sweeney must have used CGI for bra stunt, insists Hollywood Sign boss as he considers whether to press charges

The boss of the Hollywood sign has claimed that CGI was used in a video showing Sydney Sweeney decorating the landmark with bras.

The Euphoria star went viral last week after a clip of her hanging underwear on the tourist attraction was recorded without permission. 

And Jeff Zarrinnam, the head of the Hollywood Sign Trust, is convinced that parts of the footage were digitally altered.

Sydney, 28, uploaded the clip to her Instagram account and Zarrinnam thinks that the video's concluding shot - showing the actress posing and celebrating with the bra-covered sign behind her - has been altered with CGI as climbing the 50-foot sign at night would be a very delicate job.

He told the BBC's Newsbeat: 'They used CGI for that. There's no way you could have covered the sign in that amount of time. It would take you hours to do that.'

Zarrinnam also stated that it has been incorrectly claimed that Sydney can be seen climbing the letter H in the video.

The boss of the Hollywood sign has claimed that CGI was used in a video showing Sydney Sweeney decorating the landmark with bras

The Euphoria star went viral last week after a clip of her hanging underwear on the tourist attraction was recorded without permission

He said: 'I know that sign intimately. She was climbing the letter L. If she'd tried climbing the H she probably would've fallen and broken her neck.'

It has been suggested that the Christy star could face criminal charges for the stunt - which promoted her new lingerie brand Syrn - and Zarrinnam is conducting an investigation into what happened, although he has not yet received a reply from Sydney or her production company.

Zarrinnam says that the decision to press charges against Sydney is down to him and is something that he is seriously considering once he gets a full picture of what happened.

He explained: 'I'm upset and the neighbours are upset about it. We have to get the word out so people don't think they can get away with it.'

Zarrinnam also revealed that he is planning to increase security around the sign following the publicity stunt.

Last week the video shared by Sydney on her Instagram page showed the actress and her team loading up a van with duffle bags full of lingerie and driving up into the Hollywood Hills.

A laughing Sydney, dressed in all black, leads the way as the group scale the eight foot perimeter fence and climb the hill to the sign.

Lit by torches the actress says 'we're gonna caught at this rate' as she climbs onto the 45-foot-tall letters to hang lines of bras, before grinning and posing in front of the lingerie-covered sign.

And Jeff Zarrinnam, the head of the Hollywood Sign Trust, is convinced that parts of the footage were digitally altered

He told the BBC's Newsbeat: 'They used CGI for that. There's no way you could have covered the sign in that amount of time. It would take you hours to do that'

The video ends with the logo for SYRN, her new brand which is launching Wednesday and is backed by billionaire Amazon founder Jeff Bezos. 

While the Hollywood star reportedly obtained a filming permit, officials have reportedly said it may not have authorised the activity seen in the video.

The sign, which is managed by the non-profit Hollywood Sign Trust, sits on public land but is in a restricted area and it is prohibited to climb the structure, according to the Hollywood Sign Trust website.  

The site is usually patrolled by the Los Angeles Police and Fire Departments and park rangers to stop tourists entering, whilst surveillance cameras and motion censors help keep it secure.

Trespassing on the site can result in a misdemeanor charge, meaning a fine of up to $1,000 or up to six months of jail time. 

The Hollywood Chamber of Commerce could file a police report for trespassing and/or vandalism but so far have stated they are still investigating the stunt.

Last week the Hollywood Chamber of Commerce President and CEO Steve Nissen issued the following statement to ABC News:

'The production involving Sydney Sweeney and the Hollywood Sign was not authorised by the Hollywood Chamber of Commerce nor did we have prior knowledge of it.

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Sydney Sweeney slips into black lace lingerie from her Syrn line while revealing her bra size is DD

'The Hollywood Chamber of Commerce owns the intellectual property rights to the image of the Hollywood Sign, so that anyone intending to use and/or access the Hollywood Sign for commercial purposes must obtain a license or permission from the Hollywood Chamber to do so.'

'The Hollywood Chamber of Commerce did not grant a license or permission of any kind to the production involving Sydney Sweeney as reported by TMZ, nor did anyone seek a license or permission from the Chamber for that production.

'We are still investigating how and under what authority (if any) the production accessed the site.' 

The LAPD told the LA Times last week that a police report for Sweeney's trespassing had not yet been filed. 

At the time TMZ reported that Sydney's production secured permission from FilmLA to shoot at the Hollywood Sign location - but did not have approval to touch, climb or physically alter the sign itself.

In an email obtained by TMZ and allegedly sent to the production company, the Chamber warned that filming the landmark for commercial use requires a separate license - one that had not been sought or approved.

Trespassing on the site can result in a misdemeanor charge, meaning a fine of up to $1,000 or up to six months of jail time

'It has come to our attention that you and crew filmed the Hollywood Sign last night for a production connected with Persuasion Pictures,' the email reads in part.

'Please be advised that the Hollywood Chamber of Commerce owns the intellectual property rights to use of the image of the Hollywood Sign and neither you nor the production company have sought or received permission to use the images captured for any commercial use.'

The email further stated that FilmLA had previously notified the production of the requirement to obtain licensing approval from the Chamber before filming the sign for promotional purposes.

The bras were reportedly removed shortly after the shoot concluded, though several were allegedly left behind on the hillside.