Rebecca Romijn's five-month-old daughters laugh at her bowling skills.

The 'Ugly Betty' actress - who has twins Dolly Rebecca Rose and Charlie Tamara Tulip with husband Jerry O'Connell - explained her children giggle at everything, but find her sporting achievements particularly hysterical.

She said: "Jerry and I went bowling recently and we put them in their infant seats right in the front so that they could watch us, and they thought it was hilarious. It probably was. They were laughing at my score. Like, 'Mommy can't knock down any! It's so funny!' "

The 36-year-old actress added the five-month-old twins also find the family dogs - Taco, Better and Bim - hysterical.

She explained to People magazine: "They're really developing their own, very specific personas. They're starting to think that things are hilarious, like they're noticing the dogs as being anything other than furniture. The dogs were play-fighting the other day and they thought that was hysterical."

While Romijn loves being a mom, she is constantly worn out.

She revealed: "Sometimes I'm so tired, I look down at what I'm wearing, and if it's comfortable enough to sleep in, I don't even make it into my pyjamas. I'm looking down, and I'm like, 'T-shirt and stretchy pants? Yup, that's fine. Good night. Sorry, Jerry!' "

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