The succession to the British throne “is regulated not only through descent but also by Parliamentary statute,” according to the Royal Family’s website.
Prince Harry and Meghan Markle, the Duchess of Sussex, changed the line of succession with the birth of their first child on May 6.
"The Duchess and baby are both healthy and well, and the couple thank members of the public for their shared excitement and support during this very special time in their lives," read a statement on the Duke and Duchess' Instagram.
As the newest royal baby, Harry and Meghan's son will become seventh in line to the throne — behind his dad.
Here’s a look at who currently is in line for the throne after Queen Elizabeth II, who is 93.
1. The Prince of Wales
Charles, the Prince of Wales, is the oldest child of Queen Elizabeth II. He is 70 years old and the heir apparent to the throne.
2. The Duke of Cambridge
Prince William, the Duke of Cambridge, is the oldest son of Charles. The 36-year-old is second in line to the throne. He married Kate Middleton in 2011.
3. Prince George of Cambridge
At only 5 years old, Prince George of Cambridge is third in line of succession to the British throne. He is the oldest child of Prince William.
4. Princess Charlotte of Cambridge
Princess Charlotte of Cambridge is the second child of Prince William and Kate, Duchess of Cambridge. She is 4 years old.
5. Prince Louis Arthur Charles of Cambridge
Kate Middleton and Prince William welcomed their third child, a boy, on April 23, 2018, making him fifth in line to the throne.
He was named after William's grandfather, Prince Charles, and the Duke's mentor -- Louis Mountbatten -- who was killed by a bomb in 1979.
6. Prince Henry of Wales
Prince Henry of Wales – also referred to as Harry – is the sixth in line to the throne. He is the younger son of Charles, the Prince of Wales.
7. Son of Harry and Meghan
Prince Harry and Duchess Meghan welcomed their first child, a boy, on May 6. The newborn, whose name has yet to be released, is seventh in line to the throne— behind his dad.
He is Queen Elizabeth II's eighth great-grandchild and the younger cousin of Prince George, Princess Charlotte and Prince Louis.
8. Duke of York
Prince Andrew, the Duke of York, is Queen Elizabeth II’s third child and second son. The 59-year-old is eighth in line of succession to the British throne.
9. Princess Beatrice of York
Princess Beatrice of York is Prince Andrew’s oldest daughter. She is 30 years old.
10. Princess Eugenie of York
At 29 years old, Princess Eugenie of York is the youngest daughter of Prince Andrew. She wed Jack Brooksbank in October 2018 and is 10th in line for the throne.
11. The Earl of Wessex
Prince Edward, the Earl of Wessex, is the third son of Queen Elizabeth II. The 55-year-old is her fourth child and 11th in line for the throne.
12. Viscount Severn
At 11 years old, James, the Viscount Severn, is the youngest grandchild of Queen Elizabeth II. He is the only son of Prince Edward.
13. The Lady Louise Mountbatten-Windsor
Lady Louise Mountbatten-Windsor is the oldest child of Prince Edward. Lady Louise, 15, is the granddaughter of Queen Elizabeth II.
14. The Princess Royal
Anne, the Princess Royal, is the only daughter of Queen Elizabeth II and her second child. At 68 years old, she is 14th in line of succession to the throne.
15. Mr. Peter Phillips
Peter Phillips, 41, is the only son and oldest child of Anne, Princess Royal.
16. Miss Savannah Philips
Savannah Ann Kathleen is the first child of Peter Phillips. The 8-year-old is also the first great-grandchild of Queen Elizabeth II.
17. Miss Isla Phillips
Isla Elizabeth Phillips, 7, is the daughter of Peter Phillips. She is 17th in line to the throne.
18. Mrs. Michael Tindall
Zara Tindall, 37, is the only daughter of Anne, Princess Royal. She is also Anne’s second child.
Fox News' Stephen Sorace and the Associated Press contributed to this report.