Donald Trump's second inauguration included several celebrities in attendance who weren't announced in advance.

Donald Trump’s presidential inauguration has a heavy UFC presence with Dana White, Joe Rogan, Conor McGregor and more in Washington.

See images of the celebrities and prominent business leaders attending the inauguraton of President Donald Trump in Washington, D.C., on Monday.

Joe Rogan and his family have been rubbing shoulders with Donald Trump ahead of the former TV star’s inauguration.

UFC star Conor McGregor expressed optimism for the future as Donald Trump is set to retake the White House as the 47th president of the United States.

UFC fighter mingles with American conservative influencers and European populists after jetting out to DC to witness swearing-in of 47th commander-in-chief

Conor McGregor and the Paul brothers are buddying up in the nation’s capital. The controversial MMA fighter was heading to Donald Trump’s inauguration Monday morning in Washington, D.C., carpooling with two long-rumored potential boxing opponents: Jake and Logan Paul.

Dana White and Conor McGregor will both be in Washington DC for Donald Trump's inauguration on Monday, meaning it's likely that his return to the UFC will be discussed