Rachel Hollis (born January 9, 1983) is an American author, motivational speaker, and blogger. She is the author of three self-help books, including Girl, Wash Your Face and Girl, Stop Apologizing.

Her breakthrough moment on social media came in March 2015, when an Instagram photo of her celebrating her stretch marks went viral. "I wear a bikini because I'm proud of this body and every mark on it. Those marks prove that I was blessed enough to carry my babies and that flabby tummy means I worked hard to lose what weight I could," she wrote in the post. It garnered more than ten million views. Hollis' book Girl, Wash Your Face was described by The Washington Post as mixing "memoir, motivational tips, Bible quotations and common-sense girl talk." The prevailing message of Girl, Wash Your Face is one largely of female self-reliance, summed up by Hollis as "You, and only you, are ultimately responsible for how happy you are." Since the success of her book, Hollis and her family have moved outside of Austin, Texas. She frequently posts YouTube videos with motivational messages and has garnered over 163,000 subscribers. On July 27, 2020, HarperCollins announced their intention to release a new book by Hollis on September 29, 2020. The book, entitled Didn't See That Coming, was about navigating through crisis, loss, and grief.