Despite tensions between them, Prince Harry and his brother Prince William united to stand together to place wreaths of poppies to honor the United Kingdom's war dead at the annual Remembrance Sunday service at the Cenotaph in London.

The two were joined at the ceremony by their wives, Meghan Markle and Kate Middleton, who did not sit together and were not photographed together at the event.

The morning ceremony took place hours after the Sussexes and the Cambridges reunited at another Remembrance Day event at Royal Albert Hall, where they were also not spotted interacting.

In addition to Harry and William—the second in line to the British throne, their father Prince Charles—the first, their uncles Prince Andrew, Duke of York, and Prince Edward, Earl of Wessex, their aunt Anne, Princess Royal, and Queen Elizabeth II's cousin Prince Edward, Duke of Kent, also placed wreaths at the foot of the memorial on behalf of the Queen.

The 93-year-old monarch watched the ceremony while sitting in a balcony of the Foreign and Commonwealth Office with Kate and Charles' wife Camilla, Duchess of Cornwall. Meghan sat in a separate balcony with fellow lower-ranking Royals Sophie, Countess of Wessex—the Queen's son's Edward's wife, and Vice Admiral Sir Tim Laurence—Anne's husband.

Meghan wore a black belted wrap coat over a black dress and a Stephen Jones black wool bow-detail hat, according to Meghan's Mirror. Kate sported a black bespoke military-style Alexander McQueen coat with a high point collar and zip-up front, and a black velvet hat with a birdcage veil, according to Kate's Closet. She paid tribute to her grandmother Valerie Glassborow, who worked to help decipher the German Enigma Machine during World War II, with a special "Codebreakers poppy," released this year in honor of those who worked in signal intelligence.

See photos of the Royal Family at the Remembrance Day events:

Prince William, Prince Harry, Remembrance Day Service

James Veysey/Shutterstock

Prince William, Prince Harry, Remembrance Day Service

Shutterstock

Camilla Duchess of Cornwall, Queen Elizabeth, Kate Middleton, Remembrance Day Service

DAVID HARTLEY/Shutterstock

Meghan Markle, Remembrance Day Service

DAVID HARTLEY/Shutterstock

Sophie Countess of Wessex, Meghan Duchess of Sussex, Admiral Tim Laurence, Remembrance Day Service

DAVID HARTLEY/Shutterstock

Kate Middleton, Remembrance Day Service

James Veysey/Shutterstock

Queen Elizabeth, Kate Middleton, Remembrance Day Service

James Veysey/Shutterstock

Prince Charles, Remembrance Day Service

Shutterstock

Queen Elizabeth, Remembrance Day Service

James Veysey/Shutterstock

Poppy Wreaths, Cenotaph, Remembrance Day Sunday

Paul Brown/Shutterstock

Kate Middleton, Prince William, Queen Elizabeth, Prince Charles, Camila, Royals, Princess Anne, Festival of Remembrance

Chris Jackson/PA Wire

Prince Harry, Meghan Markle, Festival of Remembrance

Chris Jackson/PA Wire

Kate Middleton, Prince William, Festival of Remembrance

Chris Jackson/PA Wire

Kate Middleton, Prince William, Queen Elizabeth, Prince Charles, Camila, Royals, Princess Anne, Festival of Remembrance

Chris Jackson/PA Wire

Meghan Markle, Prince Harry, Festival of Remembrance

Chris Jackson/PA Wire

Meghan Markle, Prince Harry, Festival of Remembrance

Chris Jackson/PA Wire

Meghan Markle, Festival of Remembrance

Chris Jackson/PA Wire

Kate Middleton, Prince William, Festival of Remembrance

Chris Jackson/PA Wire

Kate Middleton, Festival of Remembrance

Chris Jackson/PA Wire

Princess Anne, Festival of Remembrance

Chris Jackson/PA Wire

Queen Elizabeth, Festival of Remembrance

Chris Jackson/PA Wire

Meghan and Harry and William and Kate's double joint appearances come weeks after the Duke of Sussex acknowledged on the ITV documentary Harry & Meghan: An African Journey that there were tensions between him and his brother, following a year of rumors of a rift that were fueled by the Sussexes' move from Kensington Palace and their formation of a separate royal household.

Despite this, the two couples, once dubbed the "Fab Four," have occasionally been photographed in public over the past year. Before this weekend, the last time they were spotted together was at a charity polo match that Harry and William played. They made it a playdate for their kids—Kate was seen with Prince George, 6, Princess Charlotte, 4, and Prince Louis, 1, while Meghan carried her and Harry's baby son Archie Harrison.

Later this month, Harry and Meghan will take Archie to the United States to spend Thanksgiving with the duchess' mother in California, before returning to the U.K. to spend Christmas with the Royals.

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