A composite image of Keir Starmer and Barack Obama.
Barack Obama has been a mentor to Keir Starmer, who's expected to become the UK prime minister after Thursday's election.
  • Keir Starmer is poised to become the UK's next prime minister.
  • He's had help opening up about his personal story from an unlikely source: Barack Obama.
  • Exit polls suggest Starmer's party winning with an estimated overall majority of 170 seats.

Britons have voted and counting is underway as the UK gears up for a radical change in leadership.

Observers are expecting a landslide win for the left-wing Labour Party, which would make its leader, Keir Starmer, prime minister and end 14 years of Conservative Party rule.