I was standing outside the Trafalgar Theatre in NYC waiting for it to open its doors to attend a play and who should pull up and get out of a cab but Alexandra and a male companion. I couldn't even tell you anything about the guy because as soon as I saw Alexandra, she was the only thing I saw. And she didn't have to use her DS fan radar on me because soon after she stepped out of the cab I whispered to the friend I was with (also a DS fan) something like "Oh my God, that's Alexandra Moltke!" - and apparently I said it a bit louder than I'd thought because at that point she looked right at me. But then, when you're getting out a cab and someone only a few feet away says your name like that, that might catch your attention.
And as we all stood outside the theater for several minutes, I couldn't help but stare until I soon realized I was making her uncomfortable, so I stopped staring. And needless to say I didn't really speak to her or mention DS (as much as I was dying to) because I didn't want to make her even more uncomfortable.