Lady Gaga arrived at the first major red carpet of her Joker: Folie à Deux press tour, dressed to turn heads in a sleeveless black Christian Dior Haute Couture ball gown and Tiffany & Co. diamonds, including a large pendant necklace. She wore a striking black lace Philip Treacy headpiece to complete the look. Her fiancé, Michael Polansky, posed alongside her for the couple’s first major red carpet appearance.

Gaga started the day in a full black look by Dior for the film’s photo call. In terms of jewelry, she opted for diamond stud earrings from Tiffany & Co. and finished the outfit off with towering Christian Louboutin heels.

The night before, Gaga attended a Warner Bros. welcome dinner for the film in a red turtleneck dress by Ferragamo.

She shared her full festival schedule on Instagram, and added news that sometime in October, the first single of her seventh album will be coming out, too. Joker: Folie à Deux hits theaters on October 4.

In May, Gaga opened up about playing Harley Quinn in the film, saying she put her own spin on the DC Comics character. “You know my version of Harley is mine, and it’s very authentic to this movie and these characters,” she told Access Hollywood, via Deadline. “I’ve never done anything like I’ve done in this movie before, so it’s all going to be completely brand new and really fun.”

Gaga spoke during a press conference today in Venice about working alongside Joaquin Phoenix, who plays Joker. “I actually really enjoyed it and it was a completely different experience than I’ve ever had with another actor,” she said, per The Hollywood Reporter. “He’s incredibly loose and free.”