United Kingdom, Feb. 2 -- 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 is convinced 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 C...