Lady Louise Windsor and James, Viscount Severn, the youngest grandchildren of Queen Elizabeth II, usually stay out of the spotlight despite their royal status. In a rare exception, the sibling duo joined their parents Prince Edward and Sophie, Countess of Wessex for a public engagement during which they also showed off their playful side.

Prince Edward, Sophie Wessex, along with both of their children Lady Louise and James, enjoyed a rare family outing in public as they participated in a cleaning drive at a Hampshire beach. The family-of-four spent an hour and a half with volunteers from the Marine Conservation Society in Portsmouth, as they collected litter from Southsea beach alongside a local beach cleaning group.

The cleaning drive was a part of "Great British Beach Clean," an annual campaign by Marine Conservation Society which has been tackling ocean pollution for 26 years. The drive will be underway for a week from Sept. 18 to Sept. 25 this year. According to MCS's website, 319 tonnes of litter has been picked from the beaches until now under the campaign.

This year's cleaning drive is being held in a different way due to the need for social distancing amid the coronavirus pandemic. Unlike other years where volunteers were encouraged to find a beach clean happening near then, this year individuals have been asked to adopt a 100m stretch of beach near them and organise their personal beach cleans with smaller groups while following social distancing measures.

Pictures and videos of the British royals from their cleaning drive were posted on the royal family's social media accounts. It showed them wearing green gloves with grabbers in their hands as they collected litter and put it in a white bin.

While helping their parents' environmental efforts, Lady Louise and James also indulged in some sibling fun. In one of the pictures, James was seen laughing mischievously as he lifted his grabber holding something towards Louise's face.

According to a report in Hello! magazine, the 12-year-old also teased his elder sister by prodding the back of her legs when they were both given grabbers for the litter pick. Meanwhile, his sister made fun of him when he was initially given two left-handed gloves. "I knew there was something wrong with you," the 16-year-old quipped.

Queen Elizabeth II's 90th birthday
Queen Elizabeth II pictured with James, Viscount Severn (left), Lady Louise (second left), Mia Tindall (holding The Queen's handbag), Savannah (third right), Isla Phillips (right), Prince George (second right) and in The Queen's arms and in the tradition of Royal portraiture, the youngest great-grandchild, Princess Charlotte c2016 Annie Leibovitz/Handout via Reuters

The teenager also had a rare interaction with the press where she shared her enthusiasm with the press about starting her A-Levels in English, history, politics, and drama. The young royal also discussed the increase in plastic waste during the coronavirus pandemic saying: "Everything has got worse this year because everyone has gone back to non-reusable, non-recyclable plastic cups."