Kate Middleton is again hitting the headlines for being pregnant with the twins. Reports are rife that the duchess of Cambridge is pregnant with twin baby girls.

According to OK! Magazine June 2 issue Kate and William are thrilled to become parents again.

"Kate has always wanted a daughter, and she's talked about it so much that William did, too," an insider revealed to the magazine.

It is also being understood that Middleton has a strong bond with sister Pipa Middleton and this has given her all the more reasons to be joyful about her alleged pregnancy.

"Kate's upbringing with Pippa [Middleton] was idyllic and she always wanted to have girls of her own to carry on the legacy of strong, happy women. Plus, she thinks George having sisters will be tremendously good for his character," reported the magazine.

The magazine reports further claim that Kate Middleton has gained 10 lbs of baby weight and has been craving sweets since conceiving a baby.

"Kate has the cookies made fresh every day," the source revealed, adding, "Wills jokes that his daughters are going to have a terrible sweet tooth!"

Meanwhile, reports further suggest that Kate Middleton is extremely excited about the fact that Prince George would be getting new siblings.

"Kate was so worried that George would not want to play with strangers," a source said. "But the way he was so sweet and loving really calmed her down. Seeing him so confident with other children, readily sharing toys, made her realize what a wonderful big brother he's going to be. She couldn't be happier about it."

Moreover, Queen Elizabeth is also excited about Kate Middleton twin pregnancy news. She has been apparently, keeping jewelry and gifts to give to the little princess.

"It's a tradition in the family. The new princesses will inherit priceless antique diamonds and artwork. There's also a stunning cradle that once belonged to Queen Victoria and a silver rattle handed down from the late queen mother, " a source said, reported the magazine.

Kate Middleton and Prince George have not confirmed the twin girl pregnancy rumours.