Tug Rice contributes an excellent overview of some of Broadway's oldest friends—leading ladies who are between 80 and 100 years old.

One of them, Patricia Morison, returned to Broadway for one night only at the age of 99!

I would add to Tug's list Shannon Bolin.

Reminds me of my own list, “Last Star Standing”—which attempts to document every TV and movie actor and/or director age 80 and up.