Charlie Kirk, prominent political activist and close ally of former President Donald Trump, has died after being shot at a college event in Utah, Trump announced Wednesday, calling him "legendary."

"The Great, and even Legendary, Charlie Kirk, is dead. No one understood or had the Heart of the Youth in the United States of America better than Charlie," Trump posted on Truth Social. "He was loved and admired by ALL, especially me, and now, he is no longer with us. Melania and my sympathies go out to his beautiful wife Erika, and family. Charlie, we love you!"

The shooting took place at Utah Valley University, where shots were fired from a building approximately 200 yards away. The suspect is now in custody, authorities confirmed.

Upon learning of the incident, President Trump called on all Americans to pray for Kirk, while Donald Trump Jr. also urged prayers for him and his family. Republican political figure JD Vance offered a heartfelt prayer, saying, "Dear God, protect Charlie in his darkest hour." Trump further ordered that flags be flown at half mast until Sunday in Kirk’s honor.

Inside the White House, the news of Kirk’s death prompted shock, anger, and sadness, sources told ABC News' Katherine Faulders. Though Kirk was not a White House staffer, he was a frequent presence at the administration and played a key role in vetting candidates for top government positions.

Known as the "Trump whisperer," Kirk was deeply involved in shaping the administration’s outreach to young voters. He founded the conservative advocacy group Turning Point USA, which hosts high school and college events and has cultivated a strong following among young conservatives. Kirk’s work with the organization helped bolster Trump’s support, particularly among men, and established him as a prominent figure in Republican political circles.

The shooting has left a profound impact on both Kirk’s supporters and the political community, underscoring his influence in shaping youth engagement in American politics.