"The Voice UK" exited BBC in November 2015. Willis, 40, co-presented it for two seasons alongside Marvin Humes, but ITV has confirmed that she'll be making the move too, reported Contactmusic.
"'The Voice UK' is very close to my heart and I am absolutely delighted to be back on the show. Roll on the blind auditions," Willis said.
However, Marvin won't be appearing on next year's series.