Suggestions by @tomprophet

Ice Cube

as Sweet Johnson in GTA San Andreas

Kyle Massey

as Big Smoke in GTA San Andreas

Keiynan Lonsdale

as Carl Johnson in GTA San Andreas

Lorene Scafaria

as Director in GTA San Andreas

Donald Glover

as Rio in Jem and the Holograms

Hayley Williams

as Stormer in Jem and the Holograms

Adore Delano

as Roxy in Jem and the Holograms

Ashley Tisdale-French

as Pizzazz in Jem and the Holograms

Dara Reneé

as Shana in Jem and the Holograms

Madelaine Petsch

as Kimber in Jem and the Holograms

Hayley Kiyoko

as Aja in Jem and the Holograms

Kim Petras

as Jem = Jerrica Benton in Jem and the Holograms

Matty Cardarople

as Gerint in Mabinogion

Daniel Howell

as Peredur in Mabinogion

Iwan Rheon

as Owain in Mabinogion

Asa Butterfield

as Rhonabwy in Mabinogion

Taron Egerton

as King Arthur in Mabinogion

Kristian Nairn

as Ysbaddaden in Mabinogion

Sadie Soverall

as Olwen in Mabinogion

Frank Turner

as Kilhwch in Mabinogion