Jacinda Ardern revealed the simple message she has for current world leaders as she touched down in London for the premiere of her new tell-all documentary Prime Minister .

The 45-year-old former politician allowed cameras inside her home and her office during her five-year administration in New Zealand .

With the help of her broadcaster husband Clarke Gayford , 48, she filmed a look inside her unique journey with motherhood that ran alongside her unexpected leadership role.

As only the second head of state to give birth while in office, Jacinda, then 37, unexpectedly became the opposition party's leader in August 2017 in the lead-up to the national elections. Jacinda Ardern shares important message for world leaders as she safeguards future for her daughter

Two months later,

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