I was raised by a bunch of Trekkies, and a father who looked and acted very much like Mr. Spock.
My first memories of Star Trek were of Captain Picard, so when some anniversary of the original series triggered a marathon I got to see the second captain of the Enterprise James T. Kirk.
He was the most handsome thing I had ever seen.
Bear with me. I was six.
Besides, who else can pull off that shade of yellow?
So yes, a young William Shatner (hehe, shat) was my first celebrity crush. It was short lived and he was eventually replaced with the kid from Free Willy and then graduated to Heath Ledger.