Halloween November 1, 2019 5:15 am ‘Late Night': Cynthia Erivo's Avatar Costume Took 3 Hours Cynthia Erivo talks about starring in the upcoming Harriet Tubman biopic and reveals how long it took to put together her Avatar Halloween costume. Local 1:35 Rita Ora reveals Taika Waititi's last-minute change to her Met Gala dress: ‘Thank God' 3:45 Gabrielle Union and Dwyane Wade's daughter had cutest reaction to mom's Met Gala dress 1:12 Ariana Grande channels Glinda at 2024 Met Gala 1:36 WATCH: Some of the most talked about looks at the Met Gala 1:34 Nicole Kidman floored over Olivia Rodrigo's AMC ad tribute