long sleeve high neck dress black ASOS Design with ruching Maxi in and long sleeves Tova | Black High-Neck Long-Sleeve

Its one-of-a-kind open back and halter style will make you want it in both colors

And Mulligan is also one of several on the award show's red carpet who chose to show off their midriff, from Day's cutout gown to Vanessa Kirby's structured baby pink dress that gives a hint of her midsection to Zendaya's canary yellow, stomach-baring look

It can be worn casually at home as a luxurious nightdress or dressed up with heels as part of a bridal party, wedding guest outfit or cocktail party

Arrange More Than One Fitting It is not impossible that following initial alterations, more tweaks might need to be made to bridesmaid dresses before the big day