Pharrell, 40, who is currently number one in the official singles chart after his track 'Happy' broke the half-million sales barrier, will be performing alongside Arctic Monkeys, Katy Perry, Bruno Mars, Bastille, Rudimental and Ellie Goulding, reported Contactmusic.
"I always look forward to seeing the artists that come together on the BRITs stage. I'm so humbled by this opportunity - performing at the awards will be surreal," Williams said.
The 'NERD' hitmaker will perform at London's O2 Arena for the BRIT Awards 2014 on February 19.