I was watching SILVER RIVER (1948) on TCM. Ann Sheridan had an amazing ability to scowl without causing a crease or wrinkle. Pretty impressive in the pre-Botox era. And unlike the frozen faced beauties of today, there was still tension and emotion in her facial expressions. Plus, when the scene called for something stronger, she could still move her face. When a line does appear, you know it's serious business.