They act with just a blank expression on their beautiful faces.

Now the woman had a blank expression on her face.

Jack looked from one to the other with a blank expression.

That blank expression when he doesn't want people to know what he's feeling.

I tried to keep a blank expression on my face.

The young man looked at me with a funny blank expression.

I didn't like it, and did my best blank expression.

Despite the question, there was still that same blank expression on his face.

He gave the idea serious thought; she could tell by the blank expression on his face.

A blank expression appeared on her face, and she didn't move.