They separate themselves with their varying street styles.
But Kendall, 19, and Kylie Jenner had no problem looking more like twins on Sunday, donning the same swimsuits as they soaked up the sun near a private pool.
Kylie, 17, took to Instagram to share a snap of the two, along with their pal Lauren Perez, matching in chic white and pale pink striped one-pieces while sitting on the edge of the large pool.
'Lauren had it first,' Kylie captioned the image, admitting she didn't start the swimsuit trend.
Lauren posted a similar snap, writing, 'My favorite kind of sandwich.'
Meanwhile, Kylie and Kendall didn't forget about Father's Day, both paying touching tributes to Caitlyn Jenner on the special holiday.