She was once hailed as one of the best dressed guests at the (now the Prince and Princess of Wales). Now the couple’s neighbour, the Marchioness of Cholmondeley, has made headlines once again after it was reported that she encouraged her close friend Kate to slip off to a music festival over the weekend. reportedly made an incognito outing to the Houghton Festival, held in the grounds of the Marquess and Marchioness’s stately home, Houghton Hall, after dining with the couple. ‘After dinner, one of the guests suggested that Catherine go to the festival,’ a source told the . ‘Catherine was nervous about the idea, but, after much discussion with her protection officers, she went with lots of security. William wasn’t there.’ Staged in the bucolic grounds of Houghton Hall, Houghton Festival is a techno extravaganza set against the incredible backdrop of pretty fields, woodlands and lake. Some 12,000 revellers descended upon the neo-Palladian pile to take in 200 artists performing across 13 stages from Thursday to Sunday. Who could have expected the Princess of Wales to be among their number? So who is the Marchioness of Cholmondeley, one of the architects behind her friend’s night of techno freedom? Here, reveals everything you need to know about his elegant mother, 39-year-old Rose. Rose married David, the 7th Marquess of Cholmondeley, at Town Hall in 2009. They first met on holiday in Italy in 2003, and announced their engagement six years later, a day before getting married. There is a 23-year age gap between the couple. David is a descendent of Sir Robert Walpole and is also related to the Rothschild and Sassoon families. The couple share two , the Earl of Rocksavage, and his twin brother, Lord Oliver Cholmondeley, as well as a younger daughter, Lady Iris. The boys are reportedly playmates of , who joined Lord Oliver as one of the King’s Pages of Honour at the coronation. The marquess and marchioness have two country homes: Houghton Hall in Norfolk, a stone’s-throw from the Prince and Princess of Wales at Anmer Hall; and Cholmondeley Castle in , but reportedly currently reside at the former. It was built for Britain’s first Prime Minister and David’s ancestor, Sir Robert Walpole. Rose was a boarder at the prestigious school before taking an Open degree. She was signed to Storm, the same agency that discovered , when she was 23. Since then she has also worked as a political researcher for Conservative MP Michael Gove, but left after having her first two children. Rose and her sister Marina posed in pink bikinis next to the former Prime Minister Tony Blair while on holiday in in 2005. Lady Elizabeth Lambert, her grandmother on her mother, Emma Hanbury’s, side, was one of eight bridesmaids at the late Queen’s 1947 wedding to . The two couples are thought to have regularly double-dated, and Kate and Rose are both also patrons of the East Anglia Children’s Hospice. The pair’s warm greetings to each other at a gala in 2016 confirmed this tight-knit relationship. Her closeness to the was cemented further in 2017, when she was sat next to at his first ever state banquet at Buckingham Palace, for which Rose wore a dazzling tiara. Most recently, her husband was appointed Lord-in-Waiting to , while their son, Lord Oliver Cholmondeley, was a Page of Honour at the coronation.