Meghan Markle is preparing herself to become a member of the royal family by shaping her etiquette after Princess Diana, according to an ex-royal butler.

Two months before she ties the knot with Prince Harry, Markle is gearing up to become a royal and bid farewell to life as a civilian.

Markle's First Official Outing With The Queen

The Suits actress, who is set to marry Prince Harry at the St. George's Chapel at Windsor Castle on May 19, made her first public outing with the Queen of England on Monday, March 12 for a celebration of Commonwealth Day at Westminster Abbey.

All members of the royal family were in attendance, including Prince Harry, Prince William, Duchess of Cambridge Kate Middleton and Markle's future in-laws Charles and Camilla.

The royal family attended a church service to commemorate Commonwealth Day, which is held on the second Monday of March every year. The service was followed by a performance by former One Direction singer Liam Payne, who belted out a rendition of John Mayer's "Waiting on the World to Change."

After Payne's performance, Markle joined the royal family as they proceeded to the square behind the Abbey to meet and greet school kids before attending the Commonwealth Day reception.

Markle's Etiquette Similar To Princess Diana's, Says Former Butler

Grant Harrold, who served as a butler to the royal family for a duration of seven years until 2011, told E! News that Markle's decorum and manners remind her of late Princess Diana, especially when she stopped to meet and hug a young schoolgirl on Commonwealth Day.

He said although Markle's gesture was sweet, it's not something that is expected from the Queen.

"It's something younger people do," Harrold pointed out. "She's got her own way of doing things... You look at the energy of Princess Diana and she was very much somebody that would hug people. She was famous for it, wasn't she?"

He added that the royal family members normally did not hug people until Princess Diana and then Prince William and Harry followed their mother's footsteps.

Harrold also noted that the American actress will have to say goodbye to her celebrity lifestyle once she becomes a royal. 

"She has to be careful what she says, how she says it, and how it's taken because after the 19th of May, it will be very much the reflection of the royal family."