Williams’ standards have been recorded by such diverse musical icons as Elvis Presley, Frank Sinatra, Barbra Streisand, Ella Fitzgerald, Ray Charles, Tony Bennett, Jason Mraz, The Carpenters, and Kermit The Frog, among others.

In 2014, Williams earned an Album of the Year Grammy for co-writing two songs which he also performs, "Touch" and "Beyond," with Daft Punk on their critically-acclaimed album Random Access Memories. Williams is currently working with Mexican film director Guillermo del Toro and Argentine composer Gustavo Santaolalla on a stage musical adaptation of del Toro’s acclaimed film Pan’s Labyrinth.