Celebrities react to the arrival of Prince Harry and Duchess of Sussex, Meghan Markle's baby boy

Prince Harry and Meghan Markle welcomed their first child on Monday.

Check out all of the messages pouring in from fellow royals, celebrities, friends and family.

Celebrities

Michelle Obama

The former first lady replied to The Royal Family's tweet with a message of congrats from her and Barack.

Ellen DeGeneres

The talk show host and comedian joked that while baby Sussex is 7th in line for the throne, she is "7th in line" at her grocery store.

Ryan Seacrest

Nina Garcia

The Elle Magazine editor-in-chief shared her congrats for the newborn, who is also a- Taurus, according to the zodiac signs.

Wendy Williams

The talk show host weighed in on the birth of the youngest royal who was born at 5:26 a.m. local time and weighed 7 pounds, 3 ounces, according to Buckingham Palace.

Royals and UK Public Figures

Duke of York

Prime Minister Theresa May

Justin Welby, Archbishop of Canterbury

The archbishop who married the Duke and Duchess of Sussex sent his congratulations and blessings for their first child.

Westminster Abbey

The Church of England

The church shared a prayer for Prince Harry and Duchess Meghan's new son.