In his final address, President Biden warned about the concentrated power of the ultra-wealthy in America, expressing concerns over its threat to democracy.

Former NHL player Wayne Gretzky was in attendance with his wife, Janet Jones. Trump has teased the former Edmonton Oilers, Los Angeles Kings and New York Rangers star. On Christmas Day, Trump urged Gretzky to become the next prime minister of Canada.

About 20,000 Trump supporters have gathered at Capital One Arena in Washington Monday afternoon, where Trump and Vice President JD Vance are expected to address the crowd later in the day. Trump is also expected to sign several executive actions at the area during his on-stage appearance.

The guest list includes some of America’s most influential tech billionaires and politicians as well as some foreign leaders and celebrities who have embraced Trump.

The first lady went patriotic at her husband’s swearing-in, wearing two U.S. fashion brands, while the new Cabinet stepped into the spotlight in sharp styles and fresh colors.

America’s tech oligarchy is making nice with the 47th president, but what about the Facebook founder’s pediatrician-turned-philanthropist wife?

Trump largely spent Inauguration day focusing on a swift reorientation away from President Joe Biden's record .

Known for embracing bold textures, Tiffany Trump’s outfit was a perfect nod to her love of modern tailoring with a touch of opulence. Tiffany brought vampish-drama in a luxurious navy velvet coat-dress with oversized buttons and a cinched waist. The rich, plush fabric was pure winter glam.

A custom hat that was almost lost and a lingerie-inspired “shirt” that may still be at large: every inaugural fashion moment that nearly stole the show.

The sight of Jeff Bezos, Mark Zuckerberg and others at President Trump’s swearing-in was another sign of how business is adapting to a new Washington.

The clothes worn on this world stage - the colour, cut and details - take the spotlight. From Melania's striking hat to Usha's fashion forward overcoat, here's a roundup of some of the day's most memorable looks.