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Meghan Markle and the queen step out together in royal first

Gibson Johns

Meghan Markle ... and the queen!

The former "Suits" actress made her most important royal debut yet on Monday, when she stepped out with fiancé Prince Harry, Prince Charles, Duchess Camilla, Prince William, Kate Middleton and Queen Elizabeth herself for a Commonwealth Day church service at Westminster Abbey.

Rocking a white topcoat and a matching white beret over a navy dress, Markle strode into the church with Harry, Kate and William, while Her Majesty wasn't far behind in a burgundy coat and hat adorned with flowers.

See photos from the outing:

During the service, Markle was seen singing along to "God Save the Queen."

The importance of Markle attending an event with Queen Elizabeth before officially marrying into the royal family is one that wasn't lost on fans of the royals. The former actress has been accepted into their inner circle quite quickly, and the fact that she made an appearance with Harry's grandmother before their wedding is indicative of that.

For her part, Duchess of Cambridge Kate Middleton didn't attend any events with her grandmother-in-law before marrying Prince William back in 2011. 

The outing comes months after another major exception was made on Markle's behalf when she spent the Christmas holiday with the senior members of the royal family at her Sandringham residence. Normally, that honor is reserved for figures who are officially part of the family.

Meghan Markle has broken the often-antiquated royal protocol on numerous other occasions, albeit in more subtle ways, like rocking a messy bun or signing an autograph. 

Here are all the times Meghan Markle has broken the rules:

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