Looks like no one added any tags here yet for you.
don't need to be paid as much
gives other children a chance
people assume the unknown cast is good due to the famous actor
draw audiences in (existing fanbases)
winona was famous in the 80s so adds to the nostalgia wanted in the film
good for marketing
reliable
not as experienced
not media trained
unknown actors (playing bad characters) might get abuse online
limited working hours (as they're children)
audiences may dislike them
associated with specific roles
expensive
over used
scheduling conflicts