Both Middleton sisters welcomed sons in 2018, and they'll be excellent resources for the Duchess of Sussex after she gives birth.
The actor is currently working in London and couldn't be more thrilled for his former co-star.
The TLC special takes a look at the upcoming arrival of the Duke and Duchess of Sussex's first child together.
'Meghan and Harry: A Royal Baby Story' airs tonight on TLC.
ET has an exclusive clip of TLC's upcoming documentary about Meghan Markle and Prince Harry's love story and baby on the way.
The Duchess of Sussex will welcome her first child with Prince Harry this spring.
Royal experts investigate the Duchess of Sussex's high staff turnover on 'Meghan & Harry: A Royal Baby Story,' airing April 9 on TLC.
The Duchess of Sussex announced her first pregnancy in October.
Meghan Markle and Prince Harry want fans' baby gifts to go to those who truly need it.
The #GlobalSussexBabyShower campaign worked to raise money for charity!
Further down the line of succession, Prince Harry's son or daughter may enjoy a more "normal" life.
The Duke and Duchess of Sussex have made the move to Windsor!
A source tells ET the Duke and Duchess of Sussex have finally moved into Frogmore Cottage ahead of Baby Sussex's birth.
Everything is falling in place for Meghan Markle and Prince Harry as they await the arrival of their first child.
