I always found George Burns hilarious. Some of his interviews on chat shows in his latter years were comedy gold.

When he was around 96 I remember an interviewee (might have been Des O'Connor) saying " I hear you've booked out the London Palladium for your 100th birthday ?"

George just dryly took a suck on his cigar and said "Yeah, I hope the Palladium is still there"

I will now go find a clip of that....