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Summer vacation with the royal Grandmother-in-Law!

Duchess Kate has scored her very first invite to the royal summer holiday at the Balmoral estate in Scotland, London's Telegraph reports. Kate and hubby Prince William, both 29, are set to join elder royals toward the end of August.

The newlyweds will be joining the Queen, Prince Philip plus Prince Charles and Camilla for royal picnics, home-cinema evenings and even family barbecues where Philip himself takes over the grill!

The getaway is a prime opportunity for Kate to meet the staff at Balmoral, where she will one day be mistress of the house.

Plus, Kate and the Queen can bond! "This is quite an important visit for Kate because, believe it or not, The Queen does not really know her very well at all," Ingrid Seward of Majesty magazine tells The Telegraph.

"Kate has never had an invitation before to stay at Balmoral - but she is family now and The Queen wants to get to know her...The Queen needs to present Kate to Scotland. The time has come."

("William and Catherine are now spending time as a married couple on Anglesey," a Clarence House rep said. "We cannot comment on their future private time."

Before that trip, however, the Duke and Duchess of Cambridge are set to attend another royal wedding in Edinburgh on July 30: Prince William's first cousin Zara Phillipps is set to wed Mike Tindall.