Metallica are to perform at the Grammys with Chinese concert pianist Lang Lang.
The rockers have been added to the line-up for the ceremony, along with a list of artists that includes nominees Katy Perry and Lorde.
It will be the first time Metallica have performed at the awards for 23 years, having last played the ceremony in 1991. Lang Lang last performed at the ceremony in 2008.
Other performers already announced include Daft Punk, who will perform with Stevie Wonder, Pharrell, Nile Rodgers and Kendrick Lamar, who will take the stage with Imagine Dragons.
The 2014 Grammy Awards will take place on Sunday January 26 at the Staples Centre in Los Angeles.