1. Cristiano Ronaldo: 272 million followers
What he's famous for: Playing soccer, winning world championships, being an international hunk.
What she's known for on Instagram: TBH, Cristiano's grid has it all—action shots, chiseled shirtless portraits, and "get you a guy who can do both" suit and tie poses: his bread and butter. His perfectly-crafted posts have paid off and his position on Instagram's most-followed list has been on the rise for years now, culminating in his ascension to the No.1 slot for two years running.
2. Ariana Grande: 228 million followers
What she's famous for: Singing, acting, ponytail-having, whirlwind romancing.
What she's known for on Instagram: Ariana's grid has major artistic vibes, with lots of black and white and vintage-y filtered photos. She's also a master of posting promotion-y pics (think concert shots, campaign photos, and music video promos) in an organic way.
3. Dwayne "The Rock" Johnson: 225 million followers
What he's famous for: Acting, (formerly) wrestling, eyebrow arching, flexing his abs/pecs/all the muscles, being the most likable, down-to-earth chiseled god-like person around.
What she's known for on Instagram: Two words: Gym. Pics. The Rock is so-named for a reason—as in "muscles as hard as a" or "body that appears to be chiseled from." The actor keeps fans up to date on his workout routine, which is a huge draw, whether you're looking for fitspo or eye candy. Another major (though perhaps less celebrated) Instagram strength of Johnson's? His selfie videos, which showcase the lovable teddy bear that lives inside the suit of muscle armor.
4. Kylie Jenner: 222 million followers
What she's famous for: Selling lip kits, running an empire, hiding "secret" pregnancies, growing up on a little show called Keeping Up With the Kardashians.
What she's known for on Instagram: Looking luxe AF literally all of the time. Kylie's feed embodies the "Instagram" lifestyle, complete with mansions, pools, private jets, Birkins, and more Lambos than you've seen in your life. Kylie's Instagram is the escapist fantasy you need to swipe through after a drab day.
5. Selena Gomez: 218 million followers
What she's famous for: Singing, acting, producing, speaking out about mental health, beautifying the world.
What she's known for on Instagram: #SponCon. Selena hasn't been the most active Instagrammer of late (which could have contributed to her drop from holding the top spot on this list just a few years ago), and a lot of her recent posts are #ads for brands she partners with, like Coach and Puma. To her credit, though, Selena has mastered the art of crafting ad posts that also double as posts you genuinely want to double-tap. Plus, with the launch of her Rare Beauty line, that spon-con now includes very handy tutorials for a truly great beauty brand.