The film's lead cast members, includingJoaquin Phoenix and Lady Gaga, looked phenomenal as they took centre stage at photocalls and the red carpet. There was still plenty of British talent in attendance, however, as The Lion King star Chiwetel Ejiofor made his long-awaited entrance.
See below for the main talent…
1/9
Lady Gaga
Applause singer Lady Gaga has had an incredible 2024 with both the Olympics and her appearance as Harley Quinn in the new Joker film. Her black dress, beret and heels were worlds apart from the zany fashion of the beloved villain.
2/9
Gaga's premiere look
When it came to Joker's premiere, Mother Monster wore an outfit that screamed 'Gaga'. The singer was dressed to the nines in a black dress with an extravagant headpiece.
3/9
Joaquin Phoenix
Leading man Joaquin struck a casual look for the photocall, rocking a plain white tee and black jeans with a pair of comfortable trainers.
4/9
Joaquin and Rain Phoenix
Joaquin smartened up for the red carpet and looked suave in a black tuxedo. He was joined by sister Rain who made a bold fashion statement in her bodysuit.
5/9
Chiwetel Ejiofor
British star Chiwetel rocked up at the Venice Film Festival and he looked super suave in a grey jacket and jeans.
6/9
Adjoa Andoh
Bridgerton star Adjoa left the 'Ton to head to Venice, and the actress rocked a regal black-and-white dress. And look at those earrings!
7/9
Zoe Lister-Jones
American actress Zoe, best known for starring in the new hit show Slip, looked sublime in a slinky silver mini dress.
America's Next Top Model star Jasmine had her modelling credentials on full display as she stunned in a ravishing striped dress with a daring thigh-high slit.