Jimmy Fallon can't help being a comedian -- even during Justin Timberlake's wedding.
Fallon interrupted Timberlake's speech at his wedding to Jessica Biel, Timberlake wrote in an essay about Fallon published Thursday in "Time" magazine's 2013 "100 Most Influential People" feature.
"Picture this: I’m in the heart of an impromptu speech at my wedding reception in front of 150 guests, pouring it out to my lovely new bride. You could hear a pin drop. I paused for just a moment in between thoughts. And then there was Jimmy, shouting a joke from his seat, sparking an improv between the two of us that went on for a good five or 10 minutes and had all our guests roaring with laughter," Timberlake wrote.
"Interrupting the groom’s speech at the wedding reception? Cracking jokes when your buddy is looking desperately for the words to say that he hopes his wife will remember forever? It turned into a moment that everyone there will remember forever."
Timberlake married Biel in Italy in October 2012. He and Fallon have been friends since they met at the 2002 MTV Video Music Awards, and have since appeared together on "Saturday Night Live" and "Late Night With Jimmy Fallon."
Timberlake and Biel may have a romance, but Timberlake and Fallon definitely have a "bromance." Click through the slideshow below to see other celebrity bromances.