It is the pointed and tightly wound, can't-miss-a-word dialogue and  slow-burning-til-massive-explosion story lines that set up "Mad Men" to  be a perennial award winner, but it is without question that is its  actors, with their nuanced performances and emotional journeys, that  make the show such a hit. 
While Jon Hamm's Don Draper is the undisputed lead, the troubled and  mysterious ad man with a dark past and present day jawline that delivers  as many messages as his mouth, the show relies almost as much on its  female scene-stealer, Joan Holloway, played by the irreplaceable  Christina Hendricks. 
It's her early 60s charm -- she seems to bow down to the ludicrous  male-female paradigm and inequitable power structure of the era, while  actually turning it on its ear to run the office and sometimes, the  personal lives of its inhabitants -- that make her performance so  powerful, but there's no mistaking that her body, matching the curvy  ideals of the times, stands out as its own sort of character.
Hendricks, a long-time working actress with roles in shows such as "Firefly"  and "Kevin Hill,"  won the pre-written role based on her acting skills,  but the sexy factor inherent in Holloway was something she brought to  the character in large part on her own. 
"When we did the pilot, that was not something that we discussed as a trait for Joan," she told Parade Magazine.  "This is something that's developed as a combination of the costuming  on the show, the hair and makeup, my portrayal of the role, and  [showrunner] Matt's [Weiner] writing. It all kind of came together and  that became much more of a focus later. It was just something the  audience brought attention to."
Now, with that mix of textured acting skill and knockout looks, Hendricks' career is truly taking off. She co-stars alongside Sarah Jessica Parker in the upcoming comedy, "I Don't Know How She Does It," playing a working woman in New York City -- but in 2011, not 1964.
""I play Sarah Jessica's best friend and partner in crime. We're sort  of these harried, rushed business women and I'm there commiserating  with her on the side," Hendricks said of the film. "We're trying to be  perfect mothers and perfect business women and perfect wives. It is a  dream to work with Sarah Jessica Parker. She's everything you want her  to be: She's incredibly smart and talented and gracious and very giving  as an actress. I just absolutely adore her."