Canadian actress Cobie Smulders has been making waves in Hollywood since the early 2000's with her co-starring role in <em>How I Met Your Mother</em> and parts in movies like <em>Walking Tall</em> and <em>Slammin' Salmonr</em>. She'll be flexing some serious superhero muscle this weekend alongside the Hulk and Thor in <em>The Avengers</em>.