Mad Men actress Christina Hendricks has killer looks, and she knows it.

Yesterday, Hendricks, who plays Joan Harris on the AMC series, appeared on TBS' Conan.

At first, Hendricks tried to remain modest about her dashing looks, simply replying with "I don't think so" when host Conan O'Brien asked if her "mesmerizing presence" makes men act "silly and dopey."

Eventually, however, Hendricks was able to come up with a pretty good example of what O'Brien meant.

"I had one incident, but this was years ago," Hendricks shared. "It was summer, and I'd just gone out and bought this little wispy, white summer dress, and I was going out to meet my friends at a British pub, and my friend Louis was waiting for me outside. This guy was riding a bike by and he starts staring at me. Louis is watching it from a distance and he said the whole thing went in slow-mo. The guy just hit the curb and flew off his bike into the street. But this was one incident!"

O'Brien suggested that that was just the only incident that Hendricks happened to notice.

"You're being very nice," the actress replied.

Still, Hendrick's modesty does not mean that she does not think about her looks. In fact, she has even considered having more fun as a blonde at the end of Mad Men, which will end after season 7.

"I have been this color now probably 20 years, and I was actually thinking at the end of Mad Men, maybe going a little bit blonder," she explained. "Maybe sort of like you are now-still red!"

Her vow to O'Brien, however, might keep Hendricks a redhead for a bit longer.

"I'm not leaving," Hendricks continues. "I promise you. I would never."

Season 7 of Mad Men premieres April 13.

Check out Hendricks' interview below:

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Follow Scharon Harding on Twitter: @SH____4.