Barnaby Joyce says he will resign as Australia's deputy prime minister following a politically damaging saga that began with his affair with a former staffer.
Mr Joyce said he would step down on Monday as leader of the Nationals, the junior government partner.
He had previously resisted calls to quit amid intense scrutiny over his ministerial conduct.
The scandal has dominated Australian headlines for more than two weeks.
He described his decision on Friday as a "circuit-breaker" for his family and new partner.
"This current cacophony of issues has to be put aside," he told reporters.
Prime Minister Malcolm Turnbull issued a statement shortly after thanking Mr Joyce for being a "a fierce advocate for rural and regional Australia".