Diane Keaton may not have been a “Belieber” before she starred in Justin Bieber’s music video for his hit “Ghost,” but it’s probably fair to say she is now — at least to some degree.

The Book Club: The Next Chapter star sat down with United Kingdom publication, Metro, to promote the sequel from Bil Holdermann, during which she also discussed co-starring alongside the Grammy-winning singer in his 2021 music video.

She said she “couldn’t believe it” when she was asked to have a major role in the video, adding, “This was like one of those things that happens, [and] you’re going, ‘I’m what?’ … And of course, it was so much fun, it couldn’t have been more fun.”

Prior to playing Bieber’s grandmother mourning the loss of her husband in the three-and-a-half minute video, Keaton admitted she “didn’t even know” the “Peaches” singer before filming.