Estonia's Prime Minister Kaja Kallas, in office since January 26, 2021. Estonia's new two-party coalition government has been sworn in with the first female prime minister since the Baltic nation regained independence in 1991. The 15-member Cabinet of Prime Minister Kaja Kallas a 43-year-old lawyer and a former European Parliament lawmaker was approved Tuesday in the 101-seat Riigikogu legislature after President Kersti Kaljulaid had first appointed it.