More What's My Line?

I realized that it's been far too long since I had a Mystery Guest from What's My Line?, so let me rectify that here.  Last night, I was watching part of the Best Picture-winner, Grand Hotel, that was on Turner Classic Movies.  Two of the cast members were John Barrymore and Lionel Barrymore.  And therefore the sibling who was missing was Ethel -- and that seemed as good a reason as any to have this particularly clip.

Here is the legendary Ethel Barrymore as the Mystery Guest.  Not your typical guest on a game show.  If you don't want to watch the entire show, she comes in around the 16:30 mark, so you can just jump forward to it.

https://www.youtube.com/watch?v=_Rk5d0LViQI