Definition of undercast in English:

undercast

Pronunciation /ˌəndərˈkast/ /ˌəndərˈkæst/

transitive verbundercast

[with object]usually be undercast
  • Allocate the parts in (a play or movie) to insufficiently skilled actors.

    ‘Apart from the lead, the play is undercast, and it is sloppily staged, even making experienced actors seen ineffectual.’
    • ‘An undercast and uninterestingly 'effective' production.’