#2 – Alyson Hannigan
Alyson Hannigan initially became famous for her roles in Buffy the Vampire Slayer, where she played 16-year-old Willow at 23, and American Pie, which featured her as high school student Michelle at the age of 25. After moving on to How I Met Your Mother, a show full of flashbacks and flashforwards that allowed her to play ages from 18 to 60, this talented actress apparently made time stand still. Born in 1974, Alyson is still free from grey hairs and wrinkles even after marrying and having two children.
It’s difficult to be mad at her for her eternal youth. Outside of acting she is known for tweeting hilarious stories about her kids and taking part in a drive to encourage breast cancer screenings.