Kick-Ass star Aaron Johnson is set to join Marvel‘s The Avengers: Age Of Ultron in the role of Quicksilver AKA Pietro Maximoff. Earlier this month Elizabeth Olsen closed in on the role of Scarlet Witch, sister to Quicksilver. Both characters also appear in Marvel’s X-Men comics. The Avengers sequel helmed by Joss Whedon is slated for May 1, 2015.