Credit: Stuart Ramson/PictureGroup

According to Elisabeth Moss, new mom January Jones won't be anything like her Mad Men alter ego Betty Draper.

"I think she's going to be a great mom," Moss, 29, told Us Weekly at the Emmy Writers Nominee Reception in North Hollywood, Calif. Thursday. "She's a very caring and protective person, and I think she's going to fit in very well with motherhood."

Jones, 33, welcomed son Xander Dane on Tuesday. The actress -- who dated Jason Sudeikis, Josh Groban and Ashton Kutcher in the past -- has not revealed the father's identity.

Moss added that the Mad Men cast couldn't be more thrilled for the first-time mom. "We're all so proud of her and happy for her and she's doing really well," she told Us. "We're all really excited to meet the baby."