It is highly unlikely that there is a single person who’s ever watched a movie that is not familiar.

It is highly unlikely that there is a single person who’s ever watched a movie that is not familiar with the famous roaring lion in the MGM’s opening credits. In fact, there were many lions during the years used for the MGM logo. The one in the photo is Jackie, pictured during the sound recording in his cage, while the sound stage was built around it.