Margot Robbie, 27, arrived at the Critics Choice Awards with her husband Tom Ackerly.
The usually stunning actress made a serious fashion faux pas with a concertina style striped dress and a garish studded belt.
Her hair appeared to have been simply scraped off her face, while frills are the bust made the actress look far bigger than she is.
She, along with Nicole Kidman, was one of the worst dressed of the night.
The Critics Choice Awards 2018 worst dressed
The Critics Choice Awards 2018 celebrated the achievements in filmmaking in 2017. Which stars hit a bum note on the red carpet this time?
Margot Robbie topped the worst dressed list for the second time in a row this awards season.
She appeared on various worst dressed lists after wearing a black and silver gown to the Golden Globes earlier this week.
Margot looked far from her usual dress in a black and cream stripped shapeless dress.
Mad Men star Kiernan Shipka wore an outfit featuring clashing prints and colours, and a garish net skirt over trousers.
Angelina Jolie wore a cheap looking white dress with feathers at the bust and an asymmetrical hem.
Big Little Lies star Nicole Kidman wore a long-sleeve high neck dress with a layered skirt and silver sparkles.
Jessica Chastain’s green dress did nothing to flatter her gorgeous figure with its shapeless Grecian style.
Allison Williams wore a nightie-like dress with a light blue skirt, white lace, and grey and brown lace panels.
Kate Bosworth’s dress was stunning, besides the huge bundle of fabric hanging from her abdomen.
Another mad men star Elizabeth Moss wore an unflattering dress which did nothing for her shapely figure.
Zoe Kazan’s dress had strange yellow details at the sleeve, looking strangely like a pair of marigolds.
Tiffany Smith wore a strange lilac gown with ruffle details, which looked like a vintage nightgown.
Asia Kate Dillon appeared to have forgotten the event she was attending in a jumper and wide-leg casual trousers combo.