Leslie Mann is one of the most interesting actresses I’ve ever worked with. She has a very rare ability to be very funny while coming from an incredibly deep and truthful place. This is especially true in “This Is 40.” In the film, there is nothing false about Leslie’s acting even in a broad circumstance. In edgy moments, she brings sincerity and in judgmental moments, she shows compassion. The film itself is very human and her performance encompasses the authenticity of a woman coming to terms with real problems, life and growing into a true adult.