It seems the two were dating way back when the Mad Men star was just starting out, and someone didn't exactly have much faith in her abilities.
"[He] was not supportive of my acting," January reveals to GQ. "He was like, 'I don't think you're going to be good at this.' So—f--k you! He only has nice things to say now—if anything, I should thank him. Because the minute you tell me I can't do something, that's when I'm most motivated."
All of which makes this headline a lot clearer.
Now that January's made it, it's nice to see her use the fame for a worthy cause.