How I Met Your Mother's Smulders is out to prove she's more than a pretty face who can get a laugh. In The Avengers, she plays S.H.I.E.L.D. Agent Maria Hill. While she doesn't have super powers, she more than holds her own with all the other men and women in tights. And if you're Samuel L. Jackson's right-hand gal, you know she's a badass.