I got to meet Betty Buckley at a concert near here, and I got her autograph! 
I was also completely tongue-tied, but I managed to get her to autograph my 
poster to 'Kalliroscope' rather than my human name. :) 

Second story: 

My grandmother took me to London for my birthday, and we saw Cats. After the 
show we went and stood outside the stage door and I jumped in front of 
everyone who came out, brandishing programme and pen. I got a lot of 
autographs, including the Rum Tum Tugger's, Electra's, Victoria's, 
Grizabella's, Mungojerrie's, and Rumpelteazer's, and lots more (bunch of 
swings). Rebecca Louis recognized me, too: She'd been Electra, and as she 
signed my programme she said "Oh, you're the one who stood up at the end! We 
like that." My grandma told her we'd come all the way from California just to 
see the show, and she looked worried and said that she hoped we were going to 
see some other stuff, too! 

--Kalliroscope