|Prince Louis of Cambridge|
|Born|| 23 April 2018|
St Mary's Hospital, London
|Full name||Louis Arthur Charles|
|Father||Prince William, Duke of Cambridge|
|Mother||Catherine, Duchess of Cambridge|
Prince Louis of Cambridge (Louis Arthur Charle; born 23 April 2018) is the third child and second son of Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge. He is fifth in the line of succession to the British throne.
Kensington Palace announced on 4 September 2017 that the Duke and Duchess of Cambridge were expecting their third child. A son was born at 11:01 BST (10:01 UTC) on 23 April 2018. He was first seen in public seven hours after his birth, outside the Lindo Wing of St Mary's Hospital. On 27 April 2018, it was announced that the baby had been named Louis Arthur Charles, after his great-great-great-uncle Lord Mountbatten and grandfather Charles, Prince of Wales.
Title and succession
Louis is, from birth, a prince of the United Kingdom entitled to the style of Royal Highness under letters patent issued by his great-grandmother Queen Elizabeth II on 31 December 2012, which gave the title and style to all children of the Prince of Wales's eldest son. He is thus styled "His Royal Highness Prince Louis of Cambridge".
Prince Louis is fifth in the line of succession to the British throne. Following the implementation of the Perth Agreement, which replaced male-preference primogeniture with absolute primogeniture, he is the first British prince to be ranked behind an elder sister in the line of succession.