Michael Fassbender was 33 in X-Men: First Class when he played the character 'Erik Lehnsherr / Magneto'.
That was over 13 years ago in 2011.
Today he is 47, and has starred in 65 movies in total, 38 of those since X-Men: First Class was released.
In X-Men: First Class, I think Michael Fassbender looks: