Melania also posted a picture of the decorations from inside the White House on Instagram, proclaiming, "The People's House is ready to celebrate #Halloween2017."
The couple also posed for photographs with the children.
Trump and Melania spoke at length with several of the children about their costumes.
The festive event spans across many presidential administrations.
Even Secretary of Veterans Affairs David Shulkin participated in the festivities, in costume.
Trump appeared to notice one particular costume and supporter.
The wave of zombies, pirates, and other costumed children gathered to receive their loot.
The event was also marked with festive political messages, like this gravestone of Trump's political opponents one visitor brought.
... while the president gave the T. rex his signature sign of approval.
The first lady appeared surprised by one of the costumes ...
Treats reportedly included presidential M&M's, home-baked cookies, and other pieces of candy.
The Trumps greeted the wave of zombies, robots, and other costumed children for the Halloween event.
Halloween decorations of previous presidents were scattered across the area.
Staff transformed the White House on Halloween eve to welcome the first family's costumed guests.
