Not too long ago, Elizabeth Olsen and Jeremy Renner where guests on the Graham Norton show. Truly amazing. They ended up talking about Scarlet Witch and her moves. (Conversation above)
In a different interview Elizabeth mentions that while others were training, she was practicing with a professional dancer to master scarlet witch's elegant movements.
I can imagine that it must feel weird to be flailing your arms pretending to shoot balls of energy out of your hands, but she did a great job. It looks sort of elegant and ballet-ish, but also badass like scarlet witch.
In the gif above Jeremy Renner looks really unimpressed we see an awkward or hawkward hawkeye. Those who have already seen Age of Ultron slight kinda spoiler ahead know how sassy hawkeye can really be.