* Different sources may have different counts: Some sources may include films in various stages of production, documentaries, cameos, or even uncredited roles.
* The definition of "movie" can be subjective: What constitutes a movie? Does it include short films, television movies, or direct-to-video releases?
However, based on reputable film databases, Robert De Niro has been in over 100 films throughout his career.
To get a more accurate count, you can search for him on websites like IMDb, which provide detailed filmographies for actors.