
I am thinking about writing to the cast of Harry Potter through the set address of Half Blood Prince. I have a poster which I would love to get signed, but I'm not sure how to write the letter

I think it sounds a bit strange to say "Dear Daniel Radcliff, Emma Watson, Rupert Grint, Bonnie Write and Evanna Lynch", but if I only address it to one of them then the others ay feel left out or not sign it.
Any suggestions from anyone?