To say we’re looking forward to new episodes of Mad Men would be a bit of an understatement. We’re obsessed with the genius character and plot development, the subtle yet on-point commentary on the shifting society of 1960s America, flawless period set designs, and oh, yeah, the clothes. Since the AMC series began in 2007, the fashion of Mad Men has made an undeniable cultural impact– more than four decades after the styles were originally popular. The past several seasons of runway shows have seen more than a few designers heavily inspired by the retro drama, and series costume designer Janie Bryant has put out two extremely well received Mad Men collections at Banana Republic.

But the fashion of Mad Men isn’t just about the time period. As the lives and stories of Don, Betty, Peggy, Joan, and Sally change and expand, so do their styles. In anticipation of Season 5′s premiere this Sunday night (which we’ve literally been waiting for our entire lives), we’ve taken a look back at some of our favorite Mad woMen through the years, from the early ’60s onwards. We can’t wait to see how Mad Men mania pans out as the 1970s creep up– but you can bet we’ll all be talking about it (and teasing our hair and wearing pencil skirts and winged liner) come Monday morning!