The best photos of Britain's royals from the 2020 Commonwealth Day Service

The annual Commonwealth Day Service at Westminster Abbey in London was especially significant this year as it marked Prince Harry and Duchess Meghan's final public event as senior members of Britain's royal family. Join Wonderwall.com as we take a look at the best photos of all the royals who stepped out for the 2020 gathering, starting with this shot of the most senior royals of all — Queen Elizabeth II, Prince Charles, Duchess Camilla, Prince William and Duchess Kate, who were seated together inside Westminster Abbey during the Commonwealth Day Service on March 9. Keep reading for more…

RELATED: Best photos from the Duke and Duchess of Sussex's final run of events as senior British royals in 2020

Prince Harry looked on as Prince William and Duchess Kate were introduced to performers inside London's Westminster Abbey following the annual Commonwealth Day Service on March 9. Organized by the Royal Commonwealth Society, the service is the largest annual interfaith gathering in the United Kingdom.

RELATED: Best photos from the Duke and Duchess of Cambridge's royal visit to Ireland

Queen Elizabeth II — wearing a pale blue cashmere coat by Stewart Parvin adorned with the Jardine Star brooch — waved to well-wishers outside the Commonwealth Service at Westminster Abbey in London on March 9. The Commonwealth represents 2.4 billion people and 54 countries working in collaboration towards shared economic, environmental, social and democratic goals.

RELATED: The most impressive royal jewels

Prince William and Duchess Kate chatted with Prince Edward and Sophie, Countess of Wessex as Prince Harry and Duchess Meghan looked on inside London's Westminster Abbey during the annual Commonwealth Service on March 9.

Prince William, Duchess Kate, Prince Harry, Duchess Meghan and Prince Edward stood during the Commonwealth Day Service at Westminster Abbey in London on March 9.

Prince William and Duchess Kate, wearing a Catherine Walker coat and a Sally-Ann Provan hat, arrived at the Commonwealth Day Service at Westminster Abbey in London on March 9.

Here's a closer look at the Sally-Ann Provan hat that Duchess Kate wore to the Commonwealth Day Service at Westminster Abbey in London on March 9. Keep reading for a back view…

Here's a look at the back of the Sally-Ann Provan hat that Duchess Kate wore atop an elaborate updo for the Commonwealth Day Service at Westminster Abbey in London on March 9.

Prince Harry and Duchess Meghan — wearing an Emilia Wickstead cape dress and a matching hat by William Chambers — arrived at Westminster Abbey in London for the Commonwealth Day Service on March 9. Keep reading for a closer look at her hat…

Duchess Meghan wore a green hat by William Chambers as she arrived at London's Westminster Abbey with Prince Harry to attend the Commonwealth Day Service on March 9.

Duchess Meghan and Prince Harry arrived at Westminster Abbey in London for the Commonwealth Day Service on March 9.

Camilla, Duchess of Cornwall arrived at Westminster Abbey in London for the Commonwealth Day Service on March 9.

Camilla, Duchess of Cornwall arrived at Westminster Abbey in London for the Commonwealth Day Service on March 9.

Prince Edward and Sophie, Countess of Wessex — who wore a Suzannah London dress and a Jane Taylor hat — arrived for the Commonwealth Day Service at Westminster Abbey in London on March 9.

Queen Elizabeth II, Prince Charles, Prince William and Prince Harry are pictured leaving the Commonwealth Service at Westminster Abbey in London on March 9.

Queen Elizabeth II, Prince Charles, Duchess Camilla, Prince William, Duchess Kate, Prince Harry and Duchess Meghan are seen leaving the Commonwealth Day Service at Westminster Abbey in London on March 9 in order of precedence.

Prince Charles, Prince William, Duchess Kate, Prince Harry, Duchess Meghan and Sophie, Countess of Wessex are pictured leaving the Commonwealth Day Service at Westminster Abbey in London on March 9.

Queen Elizabeth II met choir members as she left Westminster Abbey on March 9 following the annual Commonwealth Day Service.

Prince William and Duchess Kate met choir members as they left Westminster Abbey on March 9 following the annual Commonwealth Day Service.

Duchess Kate and Prince William spoke to young well-wishers — including one who curtsied to the Duchess of Cambridge — as they departed the Commonwealth Day Service at Westminster Abbey in London on March 9.

Prince Harry and Duchess Meghan spoke to young well-wishers as they departed the Commonwealth Day Service at Westminster Abbey in London on March 9.

Prince Charles and Camilla, Duchess of Cornwall met choir members as they left Westminster Abbey on March 9 following the annual Commonwealth Day Service.

Prince Harry spoke to clergy members as he left London's Westminster Abbey following the Commonwealth Day Service on March 9.

Prince Harry and Duchess Meghan spoke to choristers as they left Westminster Abbey in London following the Commonwealth Service on Commonwealth Day on March 9.

Prince Charles and wife Camilla, Duchess of Cornwall said their goodbyes as they left Westminster Abbey in London following the Commonwealth Day Service on March 9.

Duchess Kate and Prince William smiled as they left the Commonwealth Day Service at Westminster Abbey in London on March 9.

Duchess Meghan attended the Commonwealth Day Service at Westminster Abbey in London on March 9 — her last public event as a senior royal.