It appears that Joss Whedon's first choice to play The Scarlet Witch in
The Avengers: Age of Ultron, Saoirse Ronan, has passed on the role -- next up to the plate: Elizabeth Olsen (yes, the
other Olsen sister).
According to my sources, Saoirse Ronan has passed on the role of Wanda Maximoff, The Scarlet Witch, in The Avengers: Age of Ultron despite being, at some point or another, Joss Whedon‘s top pick for the role.
Unfazed, however, Whedon and Marvel then moved their attentions on to Elizabeth Olsen.
Source:
Bleeding Cool
