Presidential counselor Kellyanne Conway, who served as President Trump's final campaign manager during the 2016 election that carried him to victory, announced Sunday evening that she'll be leaving her White House post at the end of this month.

Her conservative lawyer husband, George Conway, who is a frequent critic of the president, simultaneously announced on social media that he will be stepping back from his position at the Lincoln Project, an entity consisting of anti-Trump Republicans and independents.

Both said they want to focus on their family. The couple have four children together.

Kellyanne Conway, who built a powerhouse Republican polling firm, became the first woman to run a successful presidential campaign in 2016 upon Trump’s victory in the 2016 general election. The veteran Republican pollster went on to become one of the most ardent defenders of Trump during his first term as president.

She announced her departure on the eve of the Republican National Convention, tweeting a statement with a tweet that said she is leaving the White House "Gratefully & Humbly" after more than three and a half years.

“The past four years have allowed me blessings beyond compare as a part of history on Election Night 2016 and as Senior Counselor to the President. It’s been heady. It’s been humbling. I am deeply grateful to the President for this honor, and to the First Lady, the Vice President and Mrs. Pence, my colleagues in the White House and the Administration, and the countless people who supported me and my work,” Conway wrote in a statement. “As many convention speakers will demonstrate this week, President Trump’s leadership has had a measurable, positive impact on the peace and prosperity of the nation, and on millions of Americans who feel forgotten no more.”

Conway said she would be "transitioning" from the White House at the end of August.