Ryan Gosling sent Barbie director Greta Gerwig a flash mob of Barbies and Kens to celebrate her 40th birthday.

The actor plays Ken in the new Barbie movie and was keen to mark the filmmaker’s special day on Friday with a gift to remember.

In a video shared on the Barbie film’s official Instagram page, Greta can be heard repeatedly saying, “Oh my god” as she watches a group of people dressed up as the iconic dolls perform an energetic dance routine to I’m Just Ken, a song recorded by Ryan for the film’s soundtrack.

Greta was caught unawares during a Pilates class by the flash mob, who also performed a routine to Dua Lipa’s track Dance the Night.

The dancers were seen ending their performance by shouting, “Happy Birthday Greta!”

The director appeared visibly moved as she declared the sequence “beautiful” and tearfully hugged members of the group.

Greta then admitted she had no idea who planned the special birthday treat, prompting someone behind the camera to offer the clue, “Think of a bagpiper”, a reference to Ryan sending a bagpiper to perform at a sleepover organised by Greta for the Barbie cast.

“Oh my God!” Greta laughingly replied once she realised Ryan had organised the flash mob.

“As Kens know…Sometimes the only way to express your feelings is through song & dance!” read a caption to accompany the footage shared on Instagram on Saturday.

“Ken Ryan sent these special Barbies and Kens to start Greta’s birthday with all the feelings!! @bookaflashmob @heymarkavery,” the message continued.

– Cover Media