Rebecca Romijn and Jerry O'Connell tote around their twin daughters

While chatting about his 10-month-old twins’ personalities, Jerry O’Connell revealed that one of them is “diabolical.”

The Irish-American actor, who is currently taking a career break to study law and be a stay-at-home dad to daughters Charlie and Dolly, and wife Rebecca Romijn are amazed at how different their babies’ personalities are already.

“One is go with anything, you put her down, she’s cool with it,” the devoted dad said. “One is just a little more demanding, and wants her way. If you have something shiny near you, she wants it and if you don’t give it to her she gets very upset.

“I shouldn’t say which, but one is a little more diabolical than the other one, but I like that, it shows spunk.”

Although he dotes on the children, O’Connell insists he and Romijn still love having time alone – no matter how brief.

He told Web site Celebrity Baby Blog: “We throw the kids at their grandparents and then we’ll take off for a couple of hours and go out to dinner.

“Sounds pretty tame, but when you have kids, you can’t fly off to Bora Bora for a weekend. Even a quiet dinner at Chili’s away from the kids is a relief.”