WATCH: Neil Gorsuch sworn in as Supreme Court justice

Judge Neil Gorsuch was sworn in Monday as the newest Supreme Court justice.

In a Rose Garden ceremony, Trump said in Gorsuch, Americans see “a man who is deeply faithful to the Constitution of the United States.” The president is predicting Gorsuch will go down as “one of the truly great justices” in the court’s history.

Gorsuch thanked his family for their “perseverance and patience” as he was sworn in by his mentor, Justice Anthony Kennedy, for whom he served as a law clerk.

The 49-year-old appeals court judge from Colorado promised to be a “faithful servant of the Constitution and laws of this great nation.”

Trump said Gorsuch would rule “not on his personal preferences but based on a fair and objective reading of the law.”

The president noted that the successful nomination came during his first 100 days in office.

Early this morning, there was private ceremony at the court, with Chief Justice John Roberts administering the constitutional oath.

Gorsuch will be seated just in time to hear one of the biggest cases of the term — a religious rights dispute over a Missouri law that bars churches from receiving public funds for general aid programs.