Showbiz
Rex Features
The actresses, who co-star in the upcoming film The Runaways and recently shared the screen in The Twilight Saga: New Moon, were thanked by the rock icon for their contribution to the biopic about her '70s band.
According to People, Fanning and Stewart retreated backstage while Jett finished her set with The Blackhearts at the show in Park City, Utah on Saturday.
The Runaways is currently playing at the Sundance Film Festival.
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