Prince William said Kate was “feeling better” but that ginger had not helped much.
Upon hearing Kate was suffering with the condition, Clueless actress Alicia Silverstone decided to reach out.
The star has released a book titled The Kind Mama, which encourages women to take charge of their fertility, pregnancy an the fist six months of having a baby.
According to OK! Magazine she penned a letter offering her advice, saying a plant-based diet helped her.
She wrote: “Congratulations on the impending arrival of your third child! I imagine that Prince George and Princess Charlotte are thrilled at the idea of a new little brother or sister.
“I was sorry to hear that you’re once again suffering from severe morning sickness.
“With the hope of supporting you during this time, please accept a copy of my book The Kind Mama.
“I wrote it because I saw some women in my life having such amazing, beautiful, blissful experiences with pregnancy, birth, and motherhood and that was so inspiring to me.
“This was in stark contrast to what we’ve come to accept as normal: having a hard time with fertility, suffering through pregnancies full of ailments, suffering through less than ideal deliveries, and the list goes on!”
Alicia added that she had consulted a number of health experts when writing the book, and said she fund ways to “ward off the symptoms that take away from an enjoyable pregnancy”.