The couple arrived at the Élysée Palace and were welcomed by French President François Hollande just after enjoying the annual St. Patrick's Day parade in London. The duchess donned the same green Catherine Walker coat dress -- only this time she took her brunette locks down.
Over the course of two days, the Duke and Duchess of Cambridge will attend a series of events, including a reception for young French leaders and a formal dinner at the residence of Her Majesty's Ambassador, Kensington Palace announced last month.
They're also scheduled to make an appearance at the Wales vs. France rugby match at the Stade de France.
Ahead of the upcoming 20th anniversary of Princess Diana's death in August, Prince William and Prince Harry released a statement on the same day it was revealed a statue in her honor will be installed in the public gardens at Kensington Palace.
"It has been 20 years since our mother's death and the time is right to recognise her positive impact in the U.K. and around the world with a permanent statue," the statement read. "Our mother touched so many lives. We hope the statue will help all those who visit Kensington Palace to reflect on her life and legacy."