Kate Middleton and Prince Harry join forces to commemorate Anzac Day - all the pictures

The Duchess of Cambridge and Prince Harry teamed up at an Anzac Day service, which was held at Westminster Abbey on Thursday morning. Kate and brother-in-law Harry joined the congregation, including the Duke of Gloucester, for the annual Anzac Day Service of Commemoration and Thanksgiving. This is Kate's first public appearance since returning to London following her Easter with the Queen in Norfolk.

MORE: Who is inside Kate Middleton's inner circle?

Anzac Day - April 25 - marks the anniversary of the start of the First World War Gallipoli landings, and is a national day of remembrance for Australia and New Zealand.

Elsewhere, Kate's husband Prince William is on the other side of the world in New Zealand. The Duke, who is visiting the country on behalf of the Queen, arrived at an Anzac Day service in Auckland as part of a two-day visit to New Zealand to honour the victims of the Christchurch terrorist attack. He joined Prime Minister Jacinda Ardern and other dignitaries at the event at the city's war memorial. After arriving at the city's war memorial, William was greeted with a traditional karanga, an exchange of calls that forms part of a powhiri, a Maori welcoming ceremony.

Click here to see all the pictures of Kate at the Anzac Day service…

Prince Harry has left pregnant wife Meghan, who is due to give birth any day now, at their Frogmore Cottage home in Berkshire to attend the event.

MORE: Who are Prince Harry's closest friends? See his squad here

Both Kate and Harry appeared to be in great spirits as they made their way inside. They were greeted by the Dean of Westminster Dr John Hall, who shook hands with them when they entered the Abbey's west door.

TO CONTINUE THE GALLERY CLICK 'CONTINUE READING' BELOW

Kate, 37, looked chic in a teal Catherine Walker coat and a matching Rosie Olivia hat. Beauty-wise, the royal wore her hair up in a chic chignon and natural makeup highlighted her stunning features.

READ: Prince William and Kate Middleton to return to their first marital home

It is understood Harry always planned to attend the service and was pleased to be able to join the congregation. But with his baby due around this period, his name was not printed in the programme in case he was unable to attend.

WATCH: Prince Harry releases inspirational message ahead of royal baby's birth

Kate was seen exchanging handshakes with members of the congregation.

Both Harry and Kate sat with the Queen's cousin the Duke of Gloucester.

MORE: All the times Prince Harry treated Meghan like the queen she is

Harry's presence suggests Meghan is showing no signs so far of giving birth soon, with the Duke able to be parted from her to attend the hour-long memorial in central London.

Kate was accompanied by brother-in-law Harry as husband Prince William is in New Zealand. She recently returned to London after spending Easter with the Queen in Norfolk.

The Duchess seen listening as the Dean of Westminster prayed for an "end to terror and for the triumph of peace" as he remembered the New Zealand mosques terrorist attack on Anzac Day. In his bidding the Dean said: "We honour today the bravery and determination of the men at Gallipoli.

"The spirit of national pride encourages us, as we bring to mind in particular the recent terrorist attack in Christchurch, New Zealand. We pray for an end to terror and for the triumph of peace."

Make sure you never miss a ROYAL story! Sign up to our newsletter to get all of our celebrity, royal and lifestyle news delivered directly to your inbox.