From "whoa!" to "oh."

At Monday night's premiere of I Don't Know How She Does It, all eyes were on Christina Hendricks, who showed off her ample cleavage in a pink satin Vivienne Westwood dress.

PHOTOS: Who else in Hollywood has crazy cleavage?

But it appears that the actress wasn't in the mood to wow the crowds with her curves the following night at an event for Self magazine.

The stunning redhead covered-up in a black turtleneck and frumpy white knee-length skirt.

PHOTOS: Hendricks and other stars who are natural blondes

The Mad Men star recently revealed it's "bizarre" that "people are constantly asking if [her] breasts are real or fake."

In an interview with the Daily Mail, Hendricks, 36, said her famous assets are "so obviously real that anyone who's ever seen or touched a breast would know."

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