James McAvoy loved his hair extensions

London: Actor James McAvoy says he loved wearing the hair extensions for `X-Men: Days of Future Past`.

The 35-year-old actor, who is a keen enthusiast of the 1970s, was determined to authentically portray his character, reportedly. "As my wife will attest, the Seventies is my favourite decade. I was like, `Yes!` I love the way I look in this film.` It`s the only time I`ve ever done that in my whole career," McAvoy said. The Scottish actor revealed that he was left exhausted after playing four characters with psychological issues back-to-back.