In February, talk show host Conan O'Brien announced he would be hosting the event.
Sporting a Boston Red Sox cap, O'Brien is preparing for his big speech.
President Obama will also be speaking tonight. Will the president give the traditionally comedic routine, or play it straight as presidents have done in the past during times of tragedy?
First Lady Michelle Obama is accompanying him and will be handing out scholarships.
The red carpet has been rolled out and ready for the A-list attendees.
University of Louisville basketball player Kevin Ware, who was injured during this year's NCAA tournament, is an invited guest of CNN.
CNN's Piers Morgan is rolling up with his guest, actor Gerard Butler.
CNN's Brianna Keilar is covering the scene at the red carpet.
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