Prime Minister's Office (Sri Lanka) the Parliament. The office of prime minister was formed in 1947 with D. S. Senanayake becoming the first Prime Minister of Ceylon. It consisted of a Secretary (Permanent Secretary) and an Assistant Secretary, who were officers of the Ceylon Civil Service, and a Private Secretary, along with clerical and support staff based at the Senate Building along with the Senate, Cabinet office and the Ministry of External Affairs and Defence. Since 1960 the prime minister's office has been based at Sirimathipaya Mansion on Sir Ernest de Silva Mawatha (formerly Flower Road), Colombo which was the former residence of philanthropist Sir
Deputy Prime Minister of Australia and Julia Gillard. In both cases, they succeeded incumbent Prime Ministers who lost the support of their party caucus mid-term and their election as party leader preceded their predecessor's resignations and their subsequent appointments as Prime Minister. Frank Forde, who had been deputy Labor leader when John Curtin died, was interim Prime Minister between 6 and 13 July 1945, when a leadership ballot took place that elected Ben Chifley as Curtin's successor. In November 2007, when the Australian Labor Party won government, Julia Gillard became Australia's first female, and first foreign-born, Deputy Prime Minister. In 2017, the position became vacant