Smiling Harry Styles and Olivia Wilde arrive separately at Don't Worry Darling photocall - The Mirror

Harry Styles attended a photocall for his new film Don't Worry Darling at the Venice Film Festival this morning ahead of the psychological thriller having its premiere at the festival tonight

Harry Styles was all smiles at the photocall for Don't Worry Darling earlier today at the Venice Film Festival ahead of the film's premiere.

The psychological thriller stars Florence Pugh, 26, as a housewife who worries there may be dark secrets behind the utopian experimental community where she lives.

Her co-stars include Styles, 28, as her on-screen husband, and the project was directed and co-produced by his now partner Olivia Wilde, 38, who he met working on the film.

Don't Worry Darling is set to premiere at the film festival in Venice tonight and after arriving in the city separately from Wilde last night, Styles attended a photocall this morning.

The singer-turned-actor arrived wearing a white top, a cream blazer with blue stripe detail, black pants and a pair of brown shoes. He accessorised the look with a blue scarf.

The photocall is understood to have come shortly before a press conference for the film was held, ahead of Don't Worry Darling having its premiere later this evening.

Director Olivia Wilde arrived separately to her boyfriend of two years as she wore an eye-catching yellow gown slashed to the waist.

In similarly happy spirits, Wilde smiled as she waved to photographers.

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Posing for photos, Wilde laughed as her ruffled canary yellow gown trailed behind her, accessorising with a diamond encrusted choker and platinum rings.

Amid rumours of a feud between Pugh and Wilde - who also has an acting role in Don't Worry Darling - there have been reports that the former will only do limited press for it.

According to Variety, she was due to miss the press conference at the Venice Film Festival earlier because of scheduling conflicts, but will attend its premiere tonight.

Wilde previously described Pugh as a "force" at the conference and addressed rumours, saying: "As for all the endless tabloid gossip and all the noise out there, I mean, the internet feeds itself."

As reported by the Hollywood Reporter, Wilde further commented about such speculation: "I don't feel the need to contribute. I think it's sufficiently well nourished."

The Mirror approached reps of Wilde, Pugh, Styles and LaBeouf for comment.

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