The gala will be held on the South Lawn of the White House on Trump's birthday, June 14.
"At the White House, I think there will be 3,000 to 4,000 spectators and then there will be more in other areas," Ari Emanuel, head of UFC's ownership organization TKO Group, told ESPN.
Big screens are expected to show the gala near the White House. Who will fight has not been announced.
"It will absolutely be the best lineup we've had," White has said previously.
