who was born Catherine Elizabeth Middleton. (She also shares the name of Kate's grandmother-in-law, Queen Elizabeth!) Kate and Prince William are "overjoyed" by the news of Pippa's baby.

RELATED VIDEO: Pippa Middleton Is Reportedly Pregnant ... “having children and leading a quiet life.” The name of Will and Kate’s baby boy will be announced in due course, the palace said.

Princess Kate's daughter Princess Charlotte and Pippa's daughter Grace both have Elizabeth as their middle name - a moniker passed on through the Middleton ... and their baby boy Inigo whom ...

Pippa Middleton is the middle child of Carole and Michael Middleton and the younger sister of the Duchess of Cambridge. She was Kate's maid of honour on her wedding day to Prince William in 2011.

Catherine, Princess of Wales, and her younger sister Pippa Matthews, once famously close, are reportedly facing growing ...

James Middleton 's tribute to his wife, Alizée, on Mothering Sunday showed that their baby son, Inigo, has her blonde hair, ...