Smith had been the long-running favourite but had denied any involvement and even pointed the finger at Ellie Goulding, who had been another top choice alongside Ed Sheeran.
Smith, 23, follows on the heels of Adele, who sang the theme for "Skyfall", winning an Oscar for her efforts, and keep Bond theme song firmly in the UK after a lengthy spell across the Atlantic, said The Hollywood Reporter.
They also become the first group to perform the title track since "Garbage for The World is Not Enough" in 1999 and the first British outfit do so since "Duran Duran" for 1985's "A View to a Kill".
