The 4-year-old little lady is the daughter of Jessica Mulroney and Ben Mulroney, Meghan Markle's longtime friends.
The 7-year-old is one of Jessica Mulroney and Ben Mulroney's twin sons. The couple are longtime friends of Meghan Markle.
Prince William and Duchess of Cambridge Kate Middleton's 3-year-old daughter is Prince Harry's niece.
Prince William and Duchess of Cambridge Kate Middleton's 4-year-old son is Prince Harry's nephew.