The 34-year-old actress gave birth to six-month-old son Xander in September and she is having a great time looking after her little one, but she doesn`t think her `Mad Men` alter-ego Betty Francis shares her enthusiasm for motherhood.

She said: "I have nothing in common with Betty when it comes to mothering. I am enjoying myself so much, whereas I don`t think Betty sees the fun in it. She sees it as a burden and an inconvenience, she`s just not good at it."

January has praised creative writer Matthew Weiner for writing her a "really beautiful" storyline for the forthcoming series of the TV drama, despite her "challenging" circumstances.

She added: "I called Matthew Weiner when I knew they were about to go into the writers` room, to tell him that I was pregnant. But I wasn`t sure whether they would write around it or include it.
"He works really well with a challenge. My storyline is really beautiful."
sections: Celebrities