Danica McKellar is all about aging gracefully. "This is 51! 🌟," McKellar wrote via Instagram on Saturday, January 3, on her 51st birthday. "No makeup, no filters, just front-facing lighting and a healthy lifestyle to look - and more importantly - *feel* the best I can. 🙌." In her fresh-faced selfie, the actress smiled for the camera and showed off her freckles, wrinkles and natural brown waves. "Today, I spent time with family (puzzling!), worked out, cold plunged in the ocean, and we're about to have dinner," she concluded her Instagram note.