Who played T'Challa in 'Black Panther'?

In which film is Nick Fury a character? Who played Thanos in 'Avengers: Infinity War'? Who played Peter Quill in 'Guardians of the Galaxy'? In which film is Peter Quill a character? In which film is T'Challa a character? Who played Erik Killmonger in 'Black Panther'? Who played Shuri in 'Black Panther'? In which film is Shuri a character?