Buz Aldrin— one of the first two humans to land on the moon.

Lennart Poettering of systemd and PulseAudio fame

Oh, and Yukihiro Matsumoto, creator of the Ruby programming language (which Retrospring is written in)

I've been noticed by Neale Donald Walsch, Suzanne Vega, Miranda Cosgrove, and maybe others, but actually had a conversation with? Chris Langan.

As far as I know nobody was famous. With probably the exception of the opera singer Mrs. Emma Kirkby. Not exactly as well known to the general public as Boris Johnson, but yeah.

Summer Glau (Firefly etc) at a sci-fi convention. She's very sweet. 😁

Jennifer Lawrence, just to say hi how are you and what are we naming our babies (I'm just kidding of course, I didn't say hi how are you)

Talked to would be a conversation in my head... so David Mitchell.

From face 2 face? Rolf Zuckowski.

Matthew McConaughey. Had a full on conversation with him.