Lady Gaga, 38, shares a kiss on the red carpet with devoted fiancé Michael Polansky, 46, and shows off her sparkling 8-carat diamond engagement ring at the 81st Venice Film Festival

Lady Gaga put on a loved-up display with her fiancé Michael Polansky as she wowed at the Venice Film Festival premiere of her new film Joker: Folie à Deux on Wednesday night.

The singer, 38, who stars as Harley Quinn in the upcoming thriller, wore a dramatic black gown and headdress as she joined Joaquin Phoenix and his sister Rain at the screening.

She looked stunning in the plunging dress which featured a velvet corset-style top which then flowed into a dramatic puffy skirt.

The look was completed with an intricate lace headdress, huge diamond earrings and a bold red lip – while she wore her bright blonde tresses in a neat bun.

She gazed adoringly at Michael as she flashed her enormous 8 carat engagement ring on the star-studded red carpet.

Lady Gaga put on a loved-up display with her fiancé Michael Polansky as she wowed at the Venice Film Festival Joker: Folie à Deux premiere on Wednesday night

Her gigantic diamond engagement ring was evident as she posed for photos on the red carpet at the event in coastal Italy

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The singer, 38, who stars as Harley Quinn in the upcoming thriller, wore a dramatic black gown and headdress as she joined Joaquin Phoenix and his sister Rain at the screening