The star-studded Mark Twain Prize for American Humor ceremony was the most notable event at the Washington arts center since the president installed himself as its chairman.

The starry Mark Twain Prize for American Humor ceremony was the most high-profile event held at the venue since the president made himself its chairman.

Among those paying tribute to the comedian at Sunday night's event in Washington, D.C., were Adam Sandler, John Mulaney, Sarah Silverman and a dozen Mark Twain impersonators.