I thought this would be a fun topic.
When I was little, my sisters called me "Macaluay Culkin".
In highschool, the kids told me I looked like the younger two Hanson brothers (you know, "MMM...Bop").
First two years of College (when I was blonde) people called me Elisabeth Shue...which was cool...and I got Cybil Shepard (really cool! Think "The Last Picture Show")...but the best was Grace Kelly! Heck yeah (I don't think so, because that would be the most flattering thing ever...and I really don't look like her).
If I go red, people always say Gillian Anderson.