Meghan MarkleandPrince Harryjoined forces withKate MiddletonandPrince Williamfor a high-profile royal outing withQueen Elizabethin London on Monday.

The royal couples attended the annual church service at Westminster Abbey (where Will and Kate wed in 2011) for Commonwealth Day, which honors the family of 53 nations, some of which have the Queen as head of state.Prince CharlesandCamilla, Duchess of Cornwallwere also in attendance.

Kate and Meghan exchanged a friendly kiss on the cheek as they greeted each other inside Westminster Abbey, while the brothers shook hands. William also greeted Meghan with a kiss on the cheek. They then chatted as Charles and Camilla made their way in.

Tim Rooke/REX/Shutterstock

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Meghan Markle and Kate Middleton.Richard Pohle - WPA Pool/Getty

Commonwealth Day 2019

Meghan made a quick change from thegreen Erdem coat she wore earlier in the dayinto a cream coat over a cream print dress with a matching pillbox hat. Kate opted for her red Catherine Walker coat dress, which she wore in New Zealand in 2014. She topped it with a matching fascinator.

Meghan Markle and Prince Harry.Tim Rooke/REX/Shutterstock

Commonwealth Day service at Westminster Abbey, London, UK - 11 Mar 2019

Kate Middleton and Prince William.BEN STANSALL/AFP/Getty

BRITAIN-ROYALS-COMMONWEALTH

Before the Queen arrived, Meghan and Charles chatted together, while Kate and Camilla were deep in conversation. Meghan and Kate gave expert curtsies as the Queen, who wore a beautiful purple coat dress and matching hat, walked in.

Queen Elizabeth.Tim Rooke/REX/Shutterstock

Commonwealth Day service at Westminster Abbey, London, UK - 11 Mar 2019

Kate Middleton.Tim Rooke/REX/Shutterstock

Commonwealth Day service at Westminster Abbey, London, UK - 11 Mar 2019

Commonwealth Day service at Westminster Abbey, London, UK - 11 Mar 2019

Prince Charles and Camilla, Duchess of Cornwall.Tim Rooke/REX/Shutterstock

Commonwealth Day service at Westminster Abbey, London, UK - 11 Mar 2019

Earlier in the day,Harry and Meghan celebrated with a group of Canadiansat Canada House in London, where the royal couple met with a group of kids who taught them how to make special maple candy.

source: people.com