Mila Kunis was 28 in Oz the Great and Powerful when she played the character 'Theodora / Wicked Witch of the West'.
That was over 10 years ago in 2013.
Today she is 39, and has starred in 49 movies in total, 13 of those since Oz the Great and Powerful was released.
In Oz the Great and Powerful, I think Mila Kunis looks: