"I use a gentle exfoliator in the morning, then tone and moisturise," she said. "Sunscreen is a must."
Biel likes natural looking locks. The 29-year-old prefers a low-maintenance look when she has her hair styled.
"I have an amazing colourist in LA. She blends my new colour with my natural shade, which allows it to grow out without obvious roots. It's perfect for me as I'm a terrible client and only go in a few times a year," she quipped in an interview with Health & Beauty magazine.