AGE 64: Meryl Streep

Actress

What makes her powerful: Like a great wine, Streep's command on the big screen has only become more refined with age. She was just nominated again, unsurprisingly, for a Best Actress Oscar for "August: Osage County" after being nominated for the same award at the Golden Globes.

Another powerful 64-year-old: Jessica Lange currently stars in "American Horror Story," for which she's been nominated for Emmys many times over.