Adorable Prince Louis has stolen our hearts again with his priceless reaction to eating a treat.
The Wales family have taken part in the Big Help Out at 3rd Upton Scouts Hut in Slough today to assist in renovating and improving the building.
It was Louis' first ever royal engagement, which he carried out with his older siblings, Prince George and Princess Charlotte for the third day of coronation celebrations.
The five-year-old took a break from digging with his dad to tuck into a sweet treat around the fire - and it's safe to say he enjoyed getting his chops around a s'more.
Footage shows Kate and a scout member helping keen Louis prepare a marshmallow biscuit sandwich, which he really could not wait to devour.
The Princess of Wales revealed her cute nickname for Louis as she told him to pop his wooden stick in the fire - affectionately calling him 'Lou-Bugs'.
The little Prince didn't waste a second getting the sticky s'more into his mouth and licked the marshmallow off his fingers before tucking in.
In the background, William can be heard joking about his youngest son: "You won't hear a peep out of him now", which got the crowd chuckling.
After Louis' first bite, he turns around and rolls his head backwards in delight, before falling onto his sister Charlotte.
The young boy's priceless reactions amused his audience and garnered interest on social media, with royal fans besotted by his humorous ways.
The Prince missed last night's Coronation Concert due to his young age and the late finish, and it's safe to say he was missed by viewers.
But today, he re-joined the Waleses to help with resetting a path, digging a new soakaway, sanding and varnishing the front door and creating a mural.
Wearing his trademark shorts, Louis sat in his father's lap as William operated a digger and moved the mechanical arm to grab a bucket full of soil before dumping it on a spoil heap.
Later, the Prince was given the task of filling a wheelbarrow with what looked like builders' sand and he focused on the job, diligently shovelling the material before wheeling the barrow himself.
George, in his Nike trainers, was allowed to use a drill and concentrated as he worked making a hole in a piece of wood.
Charlotte, in a pink jumper and denim shorts, was spotted painting what appeared to be doors and Louis tried his hand at interior decorating, making hand prints on a wall under the direction of Kate.
The 3rd Upton Scouts Hut was built in 1982 and is used by a variety of community groups in the area, including the local mosque, a senior citizens contact group for members of the Asian community and the Scout group themselves.
The building is also used by 'Slough All Nations', a group with heritage spanning across St. Kitts & Nevis, and which provides recreation and leisure activities to improve health and wellbeing and promote community cohesion.
King Charles and Queen Camilla will not be appearing publicly today – the day of the Big Help Out, which is billed as a lasting volunteering legacy to mark Charles' crowning.
The Duke and Duchess of Edinburgh Sophie and Edward are taking part in a puppy class at the Guide Dogs for the Blind Association Training Centre in Reading.
Meanwhile, Princess Anne and husband Vice Admiral Sir Tim Laurence attended a County Civic Service recognising local volunteers at Gloucester Cathedral.
The Big Help Out day is organised by The Together Coalition and partners such as The Scouts, the Royal Voluntary Service and faith groups from across the United Kingdom.
It will highlight the positive impact volunteering has on communities and will encourage people to try volunteering for themselves to create a lasting legacy.
