I do both. It just depends on who I'm sending to. If it's a theater show or for a cast (at least more than one person), I usually address my letter to the stage manager or "to whom it may concern". If it's someone who is not well known, then I write directly to them. If it's a very popular celeb, I write directly to them as well, but usually add that I don't expect them to read it (in case it is seen by others, which is likely).

Hope that makes sense lol.

If I'm writing directly to the celeb (not someone else who will be providing the auto to me from the celeb) I write like the first example. ("Dear *name of celeb". I absolutely loved you in *random movie* etc. etc.) It feels more personal

Do you write your letters to directly or in the 3rd person to the celeb you are writing too?

I mean like
Dear......
I absolutly loved You in your film please may i have your autograph.

as apposed too
Dear....
I absolutly loved Random Celeb in the film random film please may i have a photo from random celeb

Do you write like your writing to someone else by Quoting the celebs name lots of times instead of refering to them as You/Your.

If its a top celeb i write in the 3rd person stating there name.
if its just a small time star (like from a soap) i refer to them as You

Do you write your letters to directly or 3rd person to celeb