Queen Elizabeth II is the longest reigning monarch in British history. During her seven decades on the throne, she has ruled over crisis and war, seen more than a dozen prime ministers come and go, and has endured the breakup of the Empire and the formation of her beloved Commonwealth. And yet, despite decades in the public eye, the Queen herself remains a mystery...until now. This is the inside story of Elizabeth, the wife, the mother, and the Queen, as told by her closest friends and advisors.

#BecomingElizabeth is in production! Meet the cast and get your first look. | Becoming Elizabeth