Rebecca Romijn's daughter Charlie Tamara Tulip has appeared in a US advert wearing an all in one baby suit.

The tot was snapped for the Got Milk? marketing campaign with her twin sister Dolly Rebecca Rose, with her actress mum sporting the famous milk moustache.

Charlie kept it simple in a plain white all in one baby suit, sticking out her tongue for the photographer.

Dolly, meanwhile, looked happy and relaxed in a vest.

Speaking to People's Celebrity Baby Blog (CBB), X-Men star Romijn said she is happy with the pictures.

"[Charlie is] really easy-going and always smiling, doesn't cry very much … and I don't think either of us are that easy-going. We're fun but we're not that easy-going," she remarked.

The twins were pictured on the CBB last week, looking stylish in their children's winter clothing outside a cafe in California.

Romijn's actor husband Jerry O'Connell joined his daughters at the eatery in Los Angeles.ADNFCR-3005-ID-19554658-ADNFCR