WASHINGTON, Aug 8 Sonia Sotomayor was sworn in on Saturday as a US Supreme Court justice, becoming the first Hispanic justice on the nation's highest bench.

Chief Justice John Roberts administered the oath in a televised ceremony held in a conference room at the Supreme Court.

The New York-born Sotomayor, whose parents came from the US commonwealth of Puerto Rico, is only the third female justice to sit on the Supreme Court in the court's 220-year history.

“I, Sonia Sotomayor, do solemnly swear that I will administer justice without respect for person, and to equal rights to the poor and to the rich, and that I will faithfully and impartially discharge and perform all of the duties incumbent upon me as associate justice of the Supreme Court of the United States, under the constitution and laws of the United States, so help me God,” Sotomayor said, repeating Roberts's reading of the oath.

Sotomayor's widowed mother Celina held bible that Sotomayor put her hand on to take the oath, as her younger brother Juan stood by smiling.—AFP