@tsarstepan,
The Bad Seed - 1956 starring Patty McCormack as the dreadful little girl named Rhoda.
There is also currently a 2018 version of the movie being done (for television), currently in post-production. It stars Rob Lowe, with McKenna Grace as the dreaded child. Patty McCormack is listed in the credits over at IMDB, no character name listed for her.
Note, the movie is based upon the same novel, The Bad Seed by William March, character names are for whatever reason different.
There was also a 1985 television run of the movie.