In February 2020, Melissa McCarthy confirmed her casting as Ursula during an interview on The Ellen DeGeneres Show: “I play Ursula, the sea witch. It is so fun, we’re just in rehearsals. It’s been an absolute blast. Stepping into the world of Rob Marshall, it’s like a fever dream, I just went to London for a week, I was like, ‘I don’t get to go to dance camp for a week.’ All day he's like, ‘Do you want to slide down this 40-foot clam shell?’ I'm like, ‘Yes! Of course I do. What are you, crazy?’ It's been wildly creative.”