COLUMBIA, S.C. (AP) — Lindsey Graham’s sister, Darline Graham Nordone, has been named as her late brother’s temporary replacement in the U.S. Senate.

South Carolina Gov. Henry McMaster announced at a news conference at the Statehouse on Monday that Nordone would serve the remaining months on Graham’s current term, which expires in January. A person familiar with the appointment process but not authorized to speak about it publicly said Nardone would be sworn in Wednesday. She will be the first woman to represent the state in the U.S. Senate.

“It is such an honor,” Nordone said. “Lindsey has always been there for me. And now, I will be there for him.”

Graham died over the weekend at age 71. He never married or had a family of his own, but Nordone was often by her brother’s side for the political touch points of his career, speaking at events and appearing in some of his campaign ads.

After their parents died at a young age, Graham was left to raise his sister, for whom he later became legal guardian. They were very close, and she was there as he filed reelection paperwork earlier this year, along with her children and grandchildren.

A special election will be held next month to pick a new Republican nominee in the general election for Graham’s seat. He had been seeking a fifth term this year.

The rare open Senate seat has ignited a scramble among South Carolina’s most ambitious conservatives, who have been eager to climb the political ladder.

Republicans just finished a sprawling and bruising contest to figure out their nominee for succeeding McMaster, who is wrapping up his second term. State Attorney General Alan Wilson won the nomination, overcoming a field that included Lt. Gov. Pamela Evette, Rep. Nancy Mace and Ralph Norman — all of whom are now eyeing Graham’s seat following his death over the weekend.