MIT's Nexi robot expresses emotions the same way you do - with your highly mobile face.
Nexi's head and face were designed by Xitome Design with MIT. The expressive robotics started with a neck mechanism sporting 4 degrees of freedom (DoF) at the base, plus pan-tilt-yaw of the head itself. The mechanism has been constructed to time the movements so they mimic human speed.
Nexi's face has been designed to use gaze, eyebrows, eyelids and an articulate mandible to communicate a greater range of different emotions.
The chassis for the robot is also advanced; it is based on the uBot5 mobile manipulator developed by the Laboratory for Perceptual Robotics UMASS Amherst. The mobile base can balance dynamically on two wheels; Nexi has what amounts to a Segway-like body. The arms can pick up ten pounds; the plastic covering of the chassis can detect human touch.
Take a look at this video of Nexi expressing itself.
I've been trying to think of sfnal robots (as opposed to androids) with expressive faces and I'm drawing a blank; perhaps readers can help. Robbie, in Forbidden Planet, seemed to have some additional activity going on his head when he was thinking, but that doesn't quite count.