Ever since the 36-year-old announced her pregnancy in May, there has been widespread speculation suggesting she is carrying twins - and the rumours have been confirmed.
Speaking to HELLO! magazine about the news, the former Olympic swimmer said: "I feel absolutely great."
Liz Feld, President of Autism Speaks, Mrs. Ban Soon-taek, wife of U.N Secretary-General Ban Ki-moon, Charlene, Princess of Monaco, Suzanne Wright, Founder of Autism Speaks and Susan Molinari. Pic: Getty Images
Charlene, Princess of Monaco speaks with Suzanne Wright, Founder of 'Autism Speaks', during the Seventh Annual World Focus on Autism hosted by Autism Speaks. Pic: Getty Images
Pic: Getty Images
Pic: Getty Images
Pic: Getty Images
Pic: Getty Images
Prince Albert II of Monaco and Princess Charlene of Monaco leave the palace after the religious ceremony of the Royal Wedding. Pic: Getty Images
Pic: Getty Images