Andy Burnham officially became British prime minister on Monday -- the country's seventh leader in 10 years -- having already been elected as the leader of the country's Labour Party last week.
Burnham, who until recently was serving as the mayor of Greater Manchester, succeeded outgoing Prime Minister Keir Starmer.
Speaking outside the prime minister's official residence -- 10 Downing Street -- on Monday morning, Starmer said, "Today I am here to offer my resignation and close the book on my time as prime minister. My work is done."
"I thank the British people for the opportunity to serve. I go with good grace, I go with a smile, and I go proud of everything that we have achieved. Thank you very much," Starmer added.
Of his successor, the outgoing prime minister said, "I now pass the baton to Andy Burnham, I wish him every success. He has my full support."
After his address, Starmer traveled the short distance to Buckingham Palace to formally inform King Charles III of his resignation. Burnham then also traveled to palace where the king asked him to form a government.
The new prime minister then traveled to Downing Street to give his first address, telling the assembled press that Britain must show "that we can regain our stability."
Burnham said his appointment will serve as "a circuit-breaker" for the country, pledging to deliver a new political and economic model and a 10-year plan.