The 34-year-old actress married Newman in November, 2007 at Greystone Park in Beverly Hills, the same place where the couple had their first date, reported Contactmusic.
King broke the news through a picture she posted on Instagram, which she captioned "Getting ready for another baby to be squeezed into this picture".
The photograph showed King, her husband and their two dogs.
King does not appear to have any cravings for junk food as of now. She recently said that she is "obsessed" with healthy meal, nutritious food and fresh juices.