Keanu Reeves' girlfriend reveals why she doesn't dye hair

Alexandra Grant weighs in on a new study linking breast cancer to hair dye.
2:01 | 12/07/19

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Transcript for Keanu Reeves' girlfriend reveals why she doesn't dye hair
We're going to turn now to our "Gma" cover story. Keanu reeves' girlfriend Alexandra grant opening up about her decision to let her hair go gray and weighing in on that new study linking breast cancer and hair dye. We're bringing back Diane Macedo for that. Hey, Diane. Good morning. So this study made headlines all across the country. Now artist Alexandra grant known for her gray hair is challenging beauty standards and sharing why she's keeping it natural. He's the man behind movies like "The matrix" and "John wick" but in week it's Keanu reeves' rumored girlfriend in the news. 46-year-old Alexandra grant rocks gray locks and this week she's revealing why she chooses not to color her hair. On Instagram grant shared a "Newsweek" headline on breast cancer and its link to hair dye writing the numbers are staggering, especially for women of color. I went gray prematurely in my 20s and dyed my hair every color along the way until I couldn't tolerate the toxicity of the dyes. She goes on to say she supports every woman, spelled with an "X" to include transgender women and women of color. But she writes if women are perishes from those beauty standards, let's talk about those beauty standards. This week researchers revealed they found women who use permanent hair dye or straighteners were at higher risk of developing breast cancer with the association being higher for black women. It doesn't show a direct causal link between hair dye and breast cancer. A lot of things cause breast cancer. Also this was a high-risk population, so you can't extrapolate this date to the average female or male population. Reporter: As for grant she's proudly rocking her natural color which has caused her to be mistaken for actress Helen mirren. Mirren tells "Entertainment tonight" she's happy to share the look. I saw that, that was so very flattering on me because she's obviously lovely. And grant calls gray her blond. She's now getting an outpouring of support on social media including by other women who have let out their natural gray hair and they call it empowering. Awesome. Diane, thank you very much.

This transcript has been automatically generated and may not be 100% accurate.

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