"I can say that my two newest colleagues are very decent and very smart individuals," she said Wednesday at an event in Washington, D.C., according to CNN.
Ginsburg's comments come amid concerns that if she were to die or to retire from the bench, a spot would open up on the nine-member court for President Trump to appoint a third conservative justice and push the ideological balance further to the right.
In an interview with NPR on Tuesday, the 86-year-old justice refuted those concerns, saying she's "very much alive."
Ginsburg is one of the court's four liberal-leaning justices and has served on the bench since 1993. Earlier this month, she praised Kavanaugh for his entirely female staff as a "very important first."
"There is a very important first on the Supreme Court this term, and it's thanks to our new justice, Justice Kavanaugh, whose entire staff is all women. All of his law clerks are women," Ginsburg said at an event held by Georgetown Law, CNN reports.