Benjamin Lascelles, who is the second child and eldest son, of Viscount Lascelles, heir to the Harewood earldom, is to marry Carolina Velez Robledo, who is Colombian, in April. Ben's marriage received the "Declaration of Consent" during the February 11, 2009 meeting of the Privy Council.
Ben did not need the Sovereign's permission to marry, according to the Royal Marriages Act. He was born before his parents' marriage, which means he cannot inherit the Harewood earldom or the British throne. His younger brother, Alexander, is the heir after Lord Lascelles.
Ben is the second of Lord Lascelles' children to marry. His older sister, Emily, was married last year to Matthew Shard. They are the parents of a set of twins, a boy and a girl. Middle brother, Alexander, who is known as Orly, is the father of a son, Leo, who was born in March of 2008. As Alexander is not married, Leo does not have rights to the earldom or to the throne. It seems history is repeating itself.
Here is the link the the Privy Council Order