Hollywood's A-list are showing their support for President Obama -- showing up for the inauguration today in Washington, D.C.

Beyonce Knowles looked gorgeous in a Emilio Pucci black gown and Dior jacket, with husband Jay-Z looking like some handsome arm candy in a crisp Tom Ford grey suit.

And they're not the only celeb couple in attendance.

Katy Perry was joined by John Mayer at the ceremony, Katy holding a small version of Aretha Franklin's famous inauguration hat she had made for the event.

Also at the U.S. Capitol were Kelly Clarkson and her fiance Brandon Blackstock and Eva Longoria, who campaigned for Obama during the election.

Both Kelly and Beyonce will perform later today.

Of course it's not all celebs. The President's family had all eyes on them thanks to their stylish ensembles as well.

First Lady Michelle Obama looked gorgeous in a purple Thom Browne jacket and J. Crew accessories, while daughters Sasha and Malia matched in their J. Crew and Kate Spade coats.

Just in case you missed it, check out Beyonce singing the National Anthem moments ago below:

And here's Kelly singing "America":