WASHINGTON (AP) — Nearly three months after she won confirmation to the Supreme Court, Ketanji Brown Jackson is officially becoming a justice.

Jackson, 51, will be sworn as the court’s 116th justice Thursday, just as the man she is replacing, Justice Stephen Breyer, retires.

The judicial pas de deux is set to take place at noon, the moment Breyer said in a letter to President Joe Biden on Wednesday that his retirement will take effect after nearly 28 years on the nation’s highest court.

The court is expected to issue its final opinions earlier Thursday in a momentous and rancorous term that included overturning Roe v. Wade’s guarantee of the right to an abortion. The remaining cases are a challenge to the Environmental Protection Agency’s ability to regulate climate-warming emissions from power plants, and Biden’s bid to end the Trump-era “remain in Mexico” asylum program.

In a ceremony the court said it will stream live on its website, Jackson will recite two oaths required of Supreme Court justices, one administered by Breyer and the other by Chief Justice John Roberts.

Jackson, a federal judge since 2013, will be the first Black woman to serve as a justice. She will be joining three women, Justices Sonia Sotomayor, Elena Kagan and Amy Coney Barrett — the first time four women will serve together on the nine-member court.