People stunned as huge UK TV icon makes shock appearance in Joker: Folie à Deux trailer

Fans have finally had their first glimpse at Lady Gaga’s Harley Quinn opposite Joaquin Phoenix in the trailer for Joker: Folie à Deux and she has not disappointed.

What’s more, they were more than a little surprised with another appearance in the trailer, confirming the involvement of a massive British TV star in this Hollywood film.

Set against the music What The World Needs Now by Jackie DeShannon, Phoenix is seen taking to the stage to perform at a nightclub in the trailer, before Gaga joins him to run through the streets and dance against a moonlit sky.

It then ends with Quinn visiting the Joker in prison, with their intense relationship taking centre stage in the teaser.