v neck halter dress Plunging Gown - Black Amoris by Ladivine Sleeveless deep V V Neck Halter Beach Wedding

The Black Swan star added another touch of metallic majesty with the most dazzling diamond and sapphire Chopard necklace

Adorned with intricate lace embellishments, this mini dress is perfect for making a memorable entrance

Style it with heels and gold jewelry for events, weddings, or date nights, or dress it down with sandals for a softer daytime romantic look

Sineads stunning red gown was a bespoke design from House of Mooshki based on Marilyns iconic Some Like It Hot dress but made in red, with a bum cape (detachable train!) Dollys Beauty Parlour did her hair in Hollywood waves (which survived the open top bus ride!) and vintage inspired make-up to complete the look

Things have since changed: in an ever decreasingly formal society, the boundaries between eveningwear and casualwear are blurring