A TikTok video shows her talking to The Sex Lives of College Girls actress and musician, Rapp, when a person in the crowd can be heard shouting “Drew Barrymore”, causing her to look up in shock.
Looking to the side of the stage, Barrymore said: “Oh my god, yes? Hi!”
The individual then went on to identify himself and can be heard telling her: “You know who I am. I need to see you at some point while you're in New York.”
Rapp appeared concerned by his behaviour, and stood to place herself in front of Barrymore before walking off with her.
Meanwhile, an on-stage security guard quickly intercepted the man, while a second security guard helped lead him away.
After a pause in the event, which was promoting Rapp’s LP Snow Angel, the pair returned to the stage, with the musician praising Barrymore for her calm demeanour.
Rapp told the audience: “They’re like, ‘Do you need anything, do you need us to stay?’ [Barrymore] was like ‘oh no, I got it, I’m good!’”
To that the Never Been Kissed actress jokingly responded: “Well, I got a new definition of your sexiness, it’s that level of protectiveness. That went full bodyguard!
“You are my Kevin Costner!”
The cultural and community centre appeared to continue with backstage access given to some fans and a performance from Rapp as she released her debut LP Snow Angel.
The event was described as a conversation with Rapp, 23, who would “discuss her experience making the record, stories from the studio and more”.
The venue, police and the actress’s representatives have been contacted for comment.