With only weeks away from giving birth, Middleton rode a auto to the chapel instead of walking with the other members of the family.
However the couple were without Prince George and Princess Charlotte at St George's Chapel, which is where Prince Harry will Wednesday Meghan on May 19. For the outing, Middleton wore a classic dark coat.
The Royal Bumps were out at the traditional Easter service Sunday held at St. George's Chapel in Winsdor.
But, not to worry, Prince George, Princess Charlotte, Prince Harry, and Meghan Markle are all guaranteed to be at the church on May 19.
However, what is more intriguing is that the new addition to the royal family will be born a commoner, even though it will be given an impressive title.
While the Queen attended the event without Prince Philip, it is not thought his absence is due to a serious health problem, the Duke was spotted driving around the grounds of the Windsor Estate last week.
The Duchess of Cambridge, who is due to give birth to her third child with Prince William later this month, looked elegant in a knee-length coat and pillbox hat teamed with nude heels and clutch.
The Queen, who celebrates her 92nd birthday later this month, led her family into the chapel, being offered a salute by an attending police officer.
Princess Eugenie and husband-to-be Jack Brooksbank chatted with the expectant mother at the chapel's entrance.
"As the baby will be the son or daughter of the Duke and Duchess of Cambridge, they'll actually be His/Her Royal Highness Prince/Princess [name] of Cambridge", she is quoted as saying by The Sun.
On March 22 Kate made her final public engagement before giving birth.