Sienna Miller paid tribute to her 21 Bridges co-star, the late Chadwick Boseman, in Empire‘s new issue created to honor him and his legacy. Miller shared for the first time her own story about what Boseman did to get her the pay she deserved on their movie. Boseman was a producer on the film, and Miller had been a little reluctant to sign onto the project at first, though she did really want to work with him.