Happy Birthday Archie! The Queen, Prince Charles, William and Kate send their best wishes on the young royal's first birthday today as Prince Harry and Meghan Markle plan celebration at their LA mansion.

The Royals have today sent their best wishes to Prince Harry and Meghan Markle's child Archie on his first birthday. 

The Duke and Duchess of Cambridge wrote on Instagram: 'Wishing Archie a very happy first birthday today!'

While The Royal Family Instagram account said: '‪Happy Birthday to Archie Mountbatten-Windsor who is celebrating his 1st birthday today! Archie is The Queen’s eighth great-grandchild. '

And Prince Charles said: 'A very Happy Birthday to Archie, who turns one today.' 

The Duke and Duchess of Sussex are celebrating the first birthday of their son Archie while under lockdown in the US, as royal fans hope for a new picture of the couple's firstborn child.

Archie Harrison Mountbatten-Windsor turns one today and fans have taken to Twitter to call for a photo of the youngster on his birthday - as is royal tradition.

The milestone is likely to be marked by just Harry, 35, and Meghan, 38, in person.

The couple are in lock-down in their Los Angeles home with California governor Gavin Newsom having issued a 'stay-at-home' order in the state.

A royal expert said the couple plan to treat Archie to an 'organic, sugar-free cake', a splash around in their pool and a video call with the Cambridge children.

Royal expert Katie Nicholl revealed yesterday how the couple plan to celebrate Archie's first birthday, telling OK! magazine: 'The Queen will wish him happy birthday this week via Zoom as will the Cambridge children.

'They haven't seen their little cousin in months so they've been looking forward to seeing how much he's grown.'

Meanwhile she also claimed that while the family are busy settling into life in LA, the thought of having a 'little brother or sister for Archie' is 'very much on the agenda' as the couple are still considering having another child.

The royal expert also said it was unlikely the little royal would be showered with gifts on the big day, saying that he 'has everything he needs.'

She added that the couple would likely appreciate presents 'with meaning', such as donations to children's charities.

The young royal has experienced an eventful 12 months since he was born at London's Portland Hospital – first living in a cottage in the grounds of Windsor Castle, then an exclusive home on Vancouver Island in Canada and now in the sprawling metropolis known as the City of Angels. 

America is where they plan to bring up their son after walking away from the royal family in order to become financially independent, after their hopes of earning money while still supporting the Queen were ruled out.

Archie was born on May 6 last year at 5.26am, weighing 7lb 3oz, and a few days after his birth his parents proudly showed him to the world, before the Queen and Duke of Edinburgh saw the infant for the first time.

Meghan's mother Doria Ragland, a yoga instructor and social worker, was pictured at the royal gathering and she has been a constant presence in the Sussexes lives, and lives in Los Angeles where Meghan grew up and went to school.

Fans will be hoping the couple follow royal tradition and release a picture of Archie, who has rarely been seen in public.

One Twitter user, The Regal Watcher, said: 'Alright, here's hoping for we get a new photo of sweet little Archie tomorrow in celebration of his first birthday.'

Archie was born on May 6 2019 at 5.26am, weighing 7lb 3oz, and a few days after his birth his parents proudly showed him to the world. Pictured: Prince Harry with young Archie.

But some on social media users don't think the couple will release a photograph today.

One Twitter user said: 'I think they'll break the chain of releasing photographs of the royal children on their birthday.

'They will deliver a thank you message to all their fans for the money raised in support of Archie, either a video message or a posted note on a social media site.' 

He received his greatest exposure when the Sussexes took their son on his first royal tour, visiting South Africa last autumn when he was four months old.

The royal baby received a welcome kiss from Archbishop Desmond Tutu when Harry and Meghan introduced him to one of the heroes of the anti-Apartheid movement.

Archie made an impression with the Archbishop's daughter Thandeka Tutu-Gxashe, who joked the young royal favoured 'ladies better' when she caught him glancing in her direction and Meghan declared 'he likes to flirt'.

Earlier in 2019 Archie was photographed in his mother's arms while his father took part in a charity polo match.