President Donald Trump spent a few minutes at the Salute to Our Armed Services Ball in Washington on Friday, Jennifer Griffin reported.
Griffin said he and First Lady Melania Trump shared a dance on the dais, and allowed service members to join them.
Trump was also on hand for a live connection to some of the 8,500 US troops currently serving in Afghanistan.
Tony Orlando performed earlier in the evening, and Griffin said there were more surprises scheduled to come.
The event is one of three inaugural balls, the other two being the Liberty and Freedom balls.
The atmosphere at the Armed Services ball was "electric", Griffin said.
Tucker Carlson was live at the Freedom Ball, where the Radio City Rockettes were performing in full patriotic attire.
President Trump was expected to visit that event shortly after spending time at the Salute to the Armed Forces Ball.
Kristen Fisher spoke to a number of attendees at the Freedom Ball to see what they thought of the inaugural festivities.
President and First Lady Trump shared their 'first dance' at the Liberty Ball late Friday.
Trump, his family and Vice President Mike Pence and Second Lady Karen Pence joined them as well.
The Trumps later made an appearance at the Freedom Ball, where President Trump made brief remarks.
Trump thanked the crowd at the Salute to Our Armed Services ball later in the evening.
"You're amazing people," he said to the first responders and military personnel in attendance.
Trump announced to roaring cheers that Generals James Mattis and John Kelly were confirmed by the Senate; to take the posts of secretary of defense and homeland security respectively.
Troops in Afghanistan were live-streamed into the room, where they congratulated Trump on his victory.