The 19 year old Grammy winner, wore a beautiful peach Oscar de la Renta off-the-shoulder tulle gown in a blonde bombshell look, which was a homage to Marilyn Monroe.
Billie agreed to wear the gown only if it was completely fur free. She completed her look with several silver rings and bangles.
Billie changed into a marvellous red Oscar de la Renta thigh high split dress inside the gala.
Billie Eilish posted a thank you note for Oscar de la Renta on her Instagram for designing this beautiful gown fur free, as an initiative to end animal cruelty.