The touching inscription in the book, reproduced from a hand-written note in the Duchess of Sussex's distinctive calligraphy script, reads: 'For the man and the boy who make my heart go pump-pump.'
The Queen, Prince Charles , Camilla and Prince William and Kate released a joint statement saying they were 'delighted' with the news of Harry and Meghan's second child.
The Duke and Duchess of Sussex share two children: son Archie, 2, and daughter Lilibet, who was born on Friday.
Meghan Markle and Prince Harry are expected to welcome their second child, a daughter, on Thursday, according to a report.
Meghan Markle's new children's book The Bench, which is a celebration of fatherhood, features a sweet illustration of Prince Harry and their son Archie Harrison. Scroll to see the pic.
The name Lili holds special meaning for the Duchess of Sussex, whose great-great-aunt was Lillie Ragland, a successful realtor, who died when Meghan was 22
Lilibet could gain a royal title when Prince Charles takes the throne
Since stepping down from their roles within The Firm last January, the Sussexes have been given the freedom to announce their daughter's birth however they want.
‘We couldn’t be happier for you all,’ the message says
Oprah Winfrey? Never heard of her, claimed Prince Edward and his wife Sophie, the Countess of Wessex, in a new interview with The Telegraph.
Leading royal biographer Robert Lacey says the Duke and Duchess of Sussex could follow in the footsteps of Earl and Countess of Wessex - who have not styled their children prince or princess.
The statement, posted to the Archwell Foundation website said Lili was born on Friday at 11:40 a.m. in Santa Barbara, CA.