Cameron Diaz dared to go bare!

The 43-year-old actress took to Instagram on Wednesday, March 30 to share a stunning makeup-free selfie — and she looks positively glowing in the pic!

Cam posted the pretty snapshot to promote her new lifestyle and healthy-living book, The Longevity Book.

"I'm so excited to continue the [aging] conversation because learning that you can age well, will actually help you age better," she wrote alongside the flawless image of herself going au naturale. "If you understand how your body works then you can take action to help keep it in the best possible condition so it can carry you through a long and beautiful life."

RELATED: Drew Barrymore Looks Absolutely Stunning Without Makeup On — See the Pic!

In a previous interview, Cameron similarly shared her aging tips with fans. "Getting to know yourself on the smallest cellular level is so empowering," she said. "I want women to understand their own journey and be prepared for it."

Click through the gallery below to see more celebrities with and without makeup!