By Kelsey Glein
Updated Oct 06, 2016 @ 8:30 pm
House of Harlow 1960 x REVOLVE Diaz Richie - Lead 2016
Credit: Donato Sardella/Getty

Nicole Richie and Cameron Diaz might be the most stylish relatives in Hollywood.

The fashion designer and mother of two took to Instagram today to give a sweet shoutout to her actress sister-in-law—Diaz is married to Benji Madden, Richie's husband Joel Madden's twin brother—that she wrote alongside a cute snap of the famous pair. In the image, the beauties wrap their arms around each other as they smile and throw their arms up in the air. Richie wears a black top, matching pants, and a thick gold choker necklace, while Diaz dons a camouflage button-up shirt tucked into jeans.

"This years Keynote Speaker at the upcoming @PearlxChange is my sista @CameronDiaz," Richie wrote in the photo's caption. "This hot tamale is a force of light, laughter, knowledge, & hard hitting reality... All while having a smile on her face. Her love for the women in her life shows in the type of friend and person she is. Can't wait for you to hear her speak. November 5th."

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We think both of these ladies are pretty great.