The Harry Potter actor will star opposite Christian Bale in the Netflix project.
The Cannes Film Festival is back in 2021, after a year's hiatus due to Covid-19.
Tahar Rahim, Matthew Broderick and Joanna Kulig round out the cast.
The role ultimately went to Tom Hanks.
Andrew Lloyd Webber allegedly received no response from Universal.
Christina Wolfe, Ziad Bakri and Luke Norris have also been added to the cast.
The animated film is based on characters from DC's Superman.
Carey Mulligan is taking on a new #MeToo-inspired role after starring in Promising Young Woman.
A production listing stated Wedding Crashers 2 would film in Puerto Rico this summer.
Jennifer Lopez already has two films in the works with the streaming service.
Production on the film will begin this week.
Anya Taylor-Joy joins Ralph Fiennes.
