Rebecca Romijn's Twins Make Modeling Debut -- With Milk!

Scott Kirkland/Globe

Despite the angelic smiling faces of her one-year-old twin girls in their new "Got Milk?" ad, Rebecca Romijn reveals the photo shoot wasn't exactly smooth sailing. "It was challenging," she told PEOPLE last night at a launch event for the ad at the W Hotel in Los Angeles. "The last time I did this campaign in 1998, we shot it in Times Square, middle of a tropical storm, during rush hour, in July, without permits```I thought that was chaotic. Well, guess what? Shooting with nine-month old twins when one of them is not havin' it all day long```" Pressed for details, the 37-year-old mom and wife of actor-turned-law-student Jerry O' Connell says Dolly, pictured right, didn't take to her modeling debut. "I think this is one of maybe three frames where she wasn't screaming her head off and that was way more chaotic than the one that I did in 1998. I think Jerry was probably doing cartwheels behind the photographer trying to get them to calm down." Sister Charlie, meanwhile, "was loving it -- loving the lights, loving everyone standing around looking at her." The actress continues, "Dolly looks exactly how I looked as a baby and Charlie looks exactly how Jerry looked as a baby. Charlie personality-wise doesn't take after anyone. She's really easy going and always smiling, doesn't cry very much. I don't think either of us are that easy-going," she laughs. "I mean we're fun but we're not that easy going!"

(Edit:Ruby)