Professor Callahan is a middle-aged professor at Harvard Law School and the main antagonist of the 2001 film Legally Blonde. He was portrayed by Victor Garber.
Role in the film
He teaches Elle, Emmett, Vivienne, Warner, etc. There is a murder case that Callahan has and needs help on, so he picks Elle, Emmett, Vivienne and Warner as his interns on the case. Callahan picks Elle because he thinks that she is pretty, and hits on her later in the movie. Callahan ends up being fired by suspect of the murder case as her lawyer and losing the case.