A "Mad Men" co-star came out in defense of January Jones after 11-year-old actor Jared Gilmore made some not-so-flattering comments about her, reports E! Online.

Gilmore, who played Jones’ son on the AMC show before leaving for a role on another show, told TVGuide.com that he had advice for his successor: "Be careful around January Jones. She’s not as approachable as the others."

Another cast member, John Slattery, later stepped up to defend Jones, E! notes. "Well, it’s an intimidating character," Slattery said. "I mean, that’s the character. Betty Draper is an intimidating woman, I suppose, if you were a 7-year-old boy [or] her son."

Slattery, who plays Roger Sterling on the show, also called Jones a "sweetheart," the story says.

Gilmore, who played Don and Betty Draper’s son Bobby on “Mad Men,” left the show this year for a job on the new ABC show “Once Upon a Time.” Talking about his “Mad Men” TV mom he also told TV Guide: “She’s really serious about what she does.”

And it’s apparently just her. His thoughts on the rest of the cast: “Everyone else is so nice.”