What actors and actresses appeared in The Leech - 1921?

There is no film titled "The Leech" from 1921. It's possible you're thinking of a different film or the title is slightly misremembered.

To help me find the correct film, could you please provide:

* Any other details about the film: like the genre, a brief plot description, or any other actors you remember.

* Any other information about the source: where you heard about the film (e.g., a book, website, a friend's recommendation).

With more information, I can assist you in finding the correct film and its cast.