She's an A-list actress, a superhero and a super mom! JENNIFER GARNER became a household name as the unstoppable Sydney Bristow in the thrilling television series, "Alias." Since then, she's starred in movies like "Juno," "Elektra," "13 Going on 30," "Valentine's Day" and "Catch Me If You Can." She's also become half of one of Hollywood's hottest power couples! Now she's starring in the critically acclaimed, Golden Globe-nominated film "Dallas Buyers Club" in a role that could define her already illustrious career, and she's telling Ellen all about it. Plus, she's discussing what she thinks about her husband Ben Affleck taking over the role of Batman!