Ariel
I use a different fandom to do this casting.
Why?
It's fun!!
You will soon find out the fandom. If you know it. If you don't well yeah that's sad...
And Yes Genders can be changed.

Ariel
Rupert Grint

Prins Erik
Matthew Lewis

Ursula

Helena Bonham Carter

Vanessa
Emma Watson

Sebastiaan
Tom Felton

Botje
Daniel Radcliffe

Koning Triton
Michael Gambon

Jutter
Evanna Lynch

Gruwel en Griezel
James and Oliver Phelps

Max
Bonnie Wright

Chef Louis
David Bradley