OK, here are my assessments:
I never thought Mark Hamill was cute as a kid. And today ... well, still not particularly hot, but I think if I knew him in real life I'd consider him somewhere around average for his age (55, BTW).
Now, Harrison Ford in his youth is another story. He's not bad now, at 64, but back in them Star Wars days ... Whoooeee! He was the only reason to watch those movies, IMO.
I didn't think Carrie Fisher was particularly beautiful as Princess Leia. But at least now, at 50, she looks like someone you might want to be friends with.