He looked in his element this week as he met leading actors and students alongside the Queen.
King Charles and Queen Camilla toured the Royal Academy of Dramatic Art in London in what was the monarch's latest engagement since returning to duties amid his cancer treatment.
His Majesty started work again on April 30 – when he fittingly University College Hospital Macmillan Cancer Centre in London – and, including Wednesday's appearance, there have been 12 engagements since then.
They have included his presence at the unveiling of artist Jonathan Yeo's controversial portrait of him, a visit to the Chelsea Flower Show and an outing at the first Buckingham Palace garden party of the year.
Read on below for a full list of all King Charles's appearances since he was given the all clear to resume his royal duties.
May 29 - Visit to RADA
King Charles and Queen Camilla sit alongside actor David Harewood and actress Cynthia Erivo during their visit to the Royal Academy of Dramatic Art in London
On Wednesday, His Majesty and Camilla met staff, students and alumni at Rada.
The visit was the couple's first major public event since Rishi Sunak last week called a summer General Election.
The King and Queen met stars including Rada's president David Harewood and actress and singer Cynthia Erivo.
Harewood is known for his roles in TV series Homeland and Supergirl, while Erivo starred in 2019 film Harriet and is playing Elphaba in the upcoming Wicked movie.
The King, who acted in amateur productions during his days as a student at Cambridge, jokingly asked if applicants are put through 'the most horrendous auditions?'
King Charles III speaks to former Rada students Rosie Sheehy, Daniel Mays and Tanya Moodie
The King and Queen met Homeland star David Harewood and actress and singer Cynthia Erivo
May 22 - Reception for Ambassadors of Prince's Trust
Last week, the King showed off his showbusiness credentials as he met with various celebrities at a reception for ambassadors of the Prince's Trust.
His Majesty met with stars including Penny Lancaster, Martin Freeman, and Declan Donnelly, as well as Paralympian Ellie Simmonds and TV presenter and DJ Tyler West - who chose to fist bump the King.
At one point, the King forewent the traditional handshake as he fistbumped DJ Tyler West
Charles, speaking to Dec Donnelly, sent his best wishes to new dad Ant McPartlin , after being told the star was unable to join him at Buckingham Palace as he was 'helping to breastfeed' his new baby
Charles sent his best wishes to new Dec's TV partner Ant McPartlin after being told the star was unable to join him at Buckingham Palace as he was 'helping to breastfeed' his new baby.
Dec told the sovereign: 'He's not here today and sends his apologies, he's got a week old baby, he's breastfeeding, or helping with.
Charles replied: 'Please give him my regards. Fantastic. Because you are amazing.'
May 20 - Chelsea Flower Show
The King and Queen made their customary visit to the Chelsea Flower Show on May 20.
His Majesty could not hide his amusement when he was given the title 'King of the Compost' by school children.
Queen Camilla was handed a badge which read 'Queen of the Bees'.
Their Majesties were visiting the RHS No Adults Allowed Garden, designed by Harry Holding and children from Sulivan Primary School in London.
The King and Queen made their customary visit to the Chelsea Flower Show on May 20. His Majesty could not hide his amusement when he was given the title 'King of the Compost' by school children
The King smiles as he is given a tour of a garden at the Chelsea Flower Show
The King and Queen were accompanied by the Duke and Duchess of Gloucester and Prince Michael and Princess Michael of Kent.
There was also a small group of friends and relatives including Queen Camilla's daughter, Laura Lopes, her sister, Annabel Elliot and the Marquess and Marchioness of Cholmondeley.
May 16 - Royal Opera House Gala for Sir Antonio Pappano
The King appeared in great spirits as he attended a special gala performance at the Royal Opera House to celebrate outgoing music director Sir Antonio Pappano on May 16.
His Majesty, 75, became Patron of the Royal Opera House in 2009 and is a huge fan of the arts, so it's no surprise that he looked in his element.
The special one-off gala performance celebrated Sir Antonio Pappano's 22-year tenure.
It featured renowned opera singers such as Aigul Akhmetshina, Jonas Kaufmann and Bryn Terfel, as well as The Royal Opera Chorus and The Orchestra of the Royal Opera House.
The King appeared in great spirits as he attended a special gala performance at the Royal Opera House to celebrate outgoing music director Sir Antonio Pappano on May 16
May 15 - Celebrities' Buckingham Palace garden party and Service of Dedication at St Paul's
On May 15, the King attended a star-studded garden party at Buckingham Palace with Queen Camilla.
The King, 75, grinned as he greeted his many guests - including Maya Jama, Tess Daly and Vernon Kay - who were all dressed to perfection.
Charles looked dapper in a three-piece suit, patterned tie and black polished shoes.
King Charles chatting to Maya Jama at the Creative Industries Garden Party at Buckingham Palace
King Charles laughs with Lord Mayor Michael Mainelli as he and Queen Camilla leave after a service of dedication for the Order of The British Empire at St Paul's Cathedral in London
The garden party topped off a busy day for the King and Queen, after the couple attended a service of dedication for the Order of the British Empire at St Paul's Cathedral earlier that day.
At the church, they joined nearly 2,000 people who are holders of various royal honours.
Charles and Camilla were both wearing bright rose pink robes, also known as 'mantles' of the Order - and the King also had his naval uniform on underneath.
May 14 - Portrait Unveiling at Buckingham Palace
King Charles's new portrait, unveiled at a special ceremony on May 14, is nothing if not striking thanks to its scarlet hue.
But whilst some people praised Jonathan Yeo's painting as 'magnificent', others were more critical.
The painting was commissioned in 2020 to celebrate the then-Prince of Wales's 50 years as a member of The Drapers' Company.
King Charles's new portrait, unveiled at a special ceremony on May 14, is nothing if not striking thanks to its scarlet hue
The moment the King unveiled the portrait of himself as Jonathan Yeo watched on
It depicts His Majesty wearing the uniform of the Welsh Guards, of which he was made Regimental Colonel in 1975.
The painting is now on display at the Philip Mould Gallery in London until June 14.
Yeo said a butterfly on the painting echoed the King's 'metamorphosis' from Prince to King during the process.
May 13 - Visit to Hampshire Air Base
On May 13, during a visit to the Army Flying Museum in Middle Wallop, Hampshire, the King officially handed over the role of Colonel-in-Chief of The Army Air Corps to Prince William.
During the engagement, the King told Army veteran Aaron Mapplebeck that he lost his sense of taste during his cancer treatment.
Mr Mapplebeck had told the sovereign that he had the experience while undergoing chemotherapy for testicular cancer last year.
King Charles III meets staff members and their families at the Army Aviation Centre
On May 13, during a visit to the Army Flying Museum in Middle Wallop, Hampshire , the King officially handed over the role of Colonel-in-Chief of The Army Air Corps to Prince William
May 9 - Visit to Royal School of Military Engineering
In a surprise visit to the Royal School of Military Engineering on May 9, the King joked that he was glad to be 'out of my cage' as he embarked on his first military engagement since returning to public-facing duties.
Charles met military staff and their families at a training base for the Army's Royal Engineers in Surrey, while his son Prince William was on engagements in Cornwall and his wife Queen Camilla hosted a reception for an animal charity in London.
King Charles III during a visit to the Royal School of Military Engineering on May 9
The King, who was in jovial form, asked a group of parents and pupils: 'I'm glad I got all these children out of school, are you going back after?'
A child replied: 'No, day off today.' Charles then said: 'Oh, you see? I do have my uses occasionally.'
May 8 - Buckingham Palace Garden Party
On May 8, the King joined other senior royals for the first royal party of the summer season.
He was accompanied by the Duke and Duchess of Edinburgh, the Princess Royal and the Duke and Duchess of Gloucester.
Charles - known for his sense of humour - seemed to be back to his usual personable self as he joked with the guests.
On May 8, the King joined other senior royals for the first royal party of the summer season
King Charles III and Queen Camilla, listen to the National Anthem ahead of the party
May 3 - Royal Windsor Horse Show
The King was present at the third day of the Royal Windsor Horse Show on May 3.
He appeared to be in high spirits, with photos showing him smiling and pointing at the action.
Other royals present included the Duke and Duchess of Edinburgh, Princess Anne and her husband, Vice Admiral Sir Timothy Laurence.
The King was present at the third day of the Royal Windsor Horse Show on May 3
May 2 - Presented with Coronation Roll
On May 2, almost a year to the day since they were crowned, King Charles and Queen Camilla were presented with the official recording of the proceedings, the Coronation Roll.
It is the first in history to be made from paper and not parchment – which is made from calf, goat or sheepskin – due to Charles's interest in animal welfare
Their Majesties were presented with the roll by Antonia Romeo, the Clerk of the Crown in Chancery.
On May 2, almost a year to the day since they were crowned, King Charles and Queen Camilla were presented with the official recording of the proceedings, the Coronation Roll
The first page of the Coronation roll presented to King Charles and Queen Camilla
Ms Romeo said the roll comprises 57 pages stitched together and contains around 11,600 handwritten words.
The King said he was hugely impressed by 'the most marvellous illuminations'.
He jokingly asked if the document had 'all the right spellings', prompting Ms Romeo to reply: 'That's been checked many times, many times.'
'It's extraordinary, it goes right on to us leaving the abbey,' the King added.
The first Coronation Roll was created for Edward II and Queen Isabella in 1308.
The monarch appeared relaxed and in good spirits as he toured the in London.
In his first engagement since he was told by doctors he could resume his royal duties, Charles visited University College Hospital Macmillan Cancer Centre
The monarch appeared relaxed and in good spirits as he toured the facility in London.
In his first engagement since he was told by doctors he could resume his royal duties, Charles visited Macmillan Cancer Centre. Above: The King meets a patient
King Charles meets patients at the University College Hospital Macmillan Cancer Centre
He sat down to chat to those receiving chemotherapy and told them he was 'well', 'alright' and 'not too bad'.
Charles - who also said it was a 'bit of a shock' to receive a cancer diagnosis - was joined by Queen Camilla.
The visit was marked by the King being named as the new patron of Cancer Research UK.
