It is the pairing that classical-music fans have been eagerly awaiting for years.
Grammy organizers said Lang Lang will appear with Metallica in a special performance during the ceremony. They said Lang Lang continues to serve in his role as the Grammy's cultural ambassador to China. No further details of the pianist's performance with Metallica were released.
Other Grammy performers announced on Tuesday include Stevie Wonder,
Lang Lang isn't among this year's Grammy nominees, but Metallica is for "Metallica Through the Never (Music From The Motion Picture)," which is nominated for best recording package and other categories.
On Tuesday, Metallica tweeted: "We're kicking off '14 sharing the stage w/pianist Lang Lang @ the 56th Annual Grammy Awards on Sun, 1/26!"
This won't be the first time Lang Lang has performed at the Grammys. The pianist previously teamed up with jazz musician Herbie Hancock at the 2008 ceremony.
This year's classical-music nominees include recordings involving the L.A. Philharmonic and its former music director Esa-Pekka Salonen.