Nicky Hilton Rothschild feels "very prepared" for the arrival of her second child

She said: "I feel very, very prepared. I know what to expect. I'm good, I'm ready."

And the couple's 15-month-old daughter Lily can't wait to be an older sibling.

Nicky added to People magazine: "I think she'll be really sweet. She doesn't have a jealous bone in her body. When I hold other babies, she doesn't care.

"She's very sweet. I try and explain it, [but] she's too young. I did get her a doll that she gives a bottle and takes in the bath with her.

And Nicky has previously revealed she is "thrilled" to be pregnant with her second child.

A representative for the star said in a statement: "The couple are thrilled about the new addition to their family."

It came after a source claimed Nicky was past her second trimester and had confided about the good news with her friends at Princess Olympia and Prince Pavlos' joint birthday party back in July.

A source said: "It was a Marie Antoinette costume themed party so she was wearing a corset so no one could tell. It's Lily's first birthday July 8 so they are excited. They always wanted to give Lily-Grace a sibling close in age, like they both have."