The Odd Life Of Timothy Green is a unique movie because of how it has been handled.
SAGHD does not appear of the movies official website with the listed cast.
The only poster that has been released for this movie (was released a very long time ago) does not have a credits block at the bottom.
She is listed as cast in RogerMores linked Variety review; she is also named in the article and her role is described (and sounds like a small but important part of the story).
She is also listed as cast in THRs review of the movie and is also named in the article and her role is discussed (also noting that her role is important to the story) (link)
It is just my opinion RogerMore, but I think HSX would end up attaching SAGHD to the project.Ā Both of the trades made an effort to mention her in their movie reviews (as well as describing the part that plays) and made additional comments about what her character does for the movie.