10 early roles of 'Mad Men' actors before they were stars

When "Mad Men" first debuted in 2007, it featured a cast made up mostly of unknown actors.

Before the hit AMC show, many of the cast members had bit roles in TV shows and films, one was even a clown who performed at birthday parties.

But with the success of the Emmy-winning drama series, the actors' careers skyrocketed.

Today, Jon Hamm, January Jones, Christina Hendricks, John Slattery, and others, have all seen major career boosts thanks to "Mad Men."