The American filmmaker was in the crowd – well, the VIP section, we’re assuming – to see Harry entertain the masses at New York’s Madison Square Garden.
It was the former One Direction star’s final performance at the iconic venue, where he’s been in residency for a whopping 15 nights as part of his Love On Tour world tour.
Olivia, who has been dating the singer since after they started shooting Don’t Worry Darling, was spotted getting her groove on down at the front of the huge venue.
Dressed in a white dress and huge feather boa, the 38-year-old actor and director danced like nobody was watching to Harry’s hit, Music For A Sushi Restaurant, which is the opening song on his latest album, Harry’s House.
While Florence’s performance has come in for near-unanimous praise, the same cannot be said for the rest of the film, with critics picking up on plot holes, a rushed climax, and a less-than-dazzling turn from music superstar Harry.
You can make your own mind up, as Don’t Worry Darling is in cinemas from Friday 23 September. Watch the trailer below...