President Trump has decided on his nominee for the Supreme Court, a source with knowledge of the search told Fox News, though the name of the pick still is not known.

The finalists are believed to be four federal judges: Brett Kavanaugh, Raymond Kethledge, Amy Coney Barrett and Thomas Hardiman.

Trump said he will announce his choice to fill Justice Anthony Kennedy’s seat Monday night.

“I have long heard that the most important decision a U.S. President can make is the selection of a Supreme Court Justice – Will be announced tonight at 9:00 P.M,” the president tweeted.