how to both delete & add data only to specific files?

i'm trying to figure out how to change thousands of files where the following characters exist ", the" (and remove them) and then also add "the " as a prefix to that file.
e.g, changing this: "movie, the [1995]", to "the movie [1995]".
i can easily run the replace command and delete the ", the" portion from all of these files but i can't figure out how to simultaneously add "the " to the prefix of those affected files.
thank you in advance if you know how and can share with me, much appreciated!
e.g, changing this: "movie, the [1995]", to "the movie [1995]".
i can easily run the replace command and delete the ", the" portion from all of these files but i can't figure out how to simultaneously add "the " to the prefix of those affected files.
thank you in advance if you know how and can share with me, much appreciated!