Child actors in this movie
I was looking up the bios of the Kings Row cast here on the IMDb, and thought it rather ironic that the two male leads both lived to a ripe old age, one going on to become President of the United States and the other staying in a prolific career in movies and TV, while the two child actors who played their characters as boys both died in their thirties. Scotty Beckett, who played Young Parris, went on to a life of drug abuse and committed suicide after repeated attempts (not atypical of many child actors throughout the ages) while Douglas Croft, who played Young Drake, quit acting at the age of 20, slipped into obscurity and died at 37.
Ann E. Todd (Young Randy) is the only one of the child castmembers whose whereabouts are known, and the actresses who played the other central characters as girls (Mary Thomas as Young Cassandra and Joan Duvalle as Young Louise) slipped into obscurity early on as well. None of the five named child actors can be said to have had a lasting and successful adult career in film.
I wouldn't go so far as to say that there was a curse, but there sure was a lot of unfulfilled potential!