The 10 fastest-growing US Instagram accounts of August 2026
The 10 fastest-growing US Instagram accounts of August 2026
Marvelâs D23 publicity cycle was the dominant verified theme among August 2026âs fastest-growing U.S. Instagram accounts, powering four of the top 10 entries. Sadie Sink led the list after debuting as Jean Grey and appearing at Disneyâs D23 Expo, while Dolly Partonâs death on Aug. 25 drove a memorial-fueled surge to the No. 2 spot. Beyond Hollywoodâs franchise machine, a viral Drake livestream moment and a breakout Prime Video premiere produced the monthâs clearest examples of independent and emerging-talent growth. compiled the full ranking of the fastest-growing Instagram accounts in the U.S. for last month.
#1. Sadie Sink |
Gained: +2.1M followers
August total: 34.8M followers
Sink appeared at Disneyâs D23 Expo on Aug. 14 after debuting as Jean Grey in âSpider-Man: Brand New Dayâ to promote the newly announced âX-Menâ film, as âBrand New Dayâ continued its run past $2 billion worldwide.
#2. Dolly Parton |
Gained: +1.5M followers
August total: 10.1M followers
Country music legend Dolly Parton died on Aug. 25 after a brief battle with cancer, prompting a wave of public tributes from fans, fellow musicians, and officials across social media.
#3. Inde Navarrette |
Gained: +1.2M followers
August total: 5.1M followers
Navarrette was revealed as Rogue in the upcoming âX-Menâ film during Disneyâs D23 Expo on Aug. 14, extending a breakout year that began with her acclaimed performance in the horror hit âObsession.â
#4. Robert Downey Jr. |
Gained: +1.0M followers
August total: 58.7M followers
Downey appeared at D23 on Aug. 14 as Marvel showcased new footage from âAvengers: Doomsday,â ahead of the filmâs December release. Downey is playing Doctor Doom in the new film.
#5. Zendaya |
Gained: +963K followers
August total: 178.0M followers
Zendaya rode the record-breaking box office run of âSpider-Man: Brand New Day,â which crossed $1 billion worldwide in six days in early August, the second-fastest film ever to hit that mark.
#6. MrBeast |
Gained: +903.7K followers
August total: 89.1M followers
After announcing his marriage to gaming streamer Thea Booysen in July, YouTube sensation MrBeast kept pace with his regular content upload schedule in August.
#7. Mayor Zohran Kwame Mamdani |
Gained: +878.5K followers
August total: 4.7M followers
The mayor of New York City drew sustained national coverage over his administrationâs pied-Ă -terre tax rollout (first announced in July) and an ethics complaint filed by a Washington, D.C.-based watchdog group over the use of official events to endorse Democratic candidates.
#8. Lin Lamar |
Gained: +716.9K followers
August total: 3.0M followers
Lamar went viral on Aug. 8 after appearing in a â20 v 1â dating segment on rapper Drakeâs Kick livestream, where a clip of her getting him to bark on camera spread widely.
#9. Marvel Entertainment |
Gained: +696K followers
August total: 65.1M followers
Marvel anchored a blockbuster D23 Expo weekend with new looks at âAvengers: Doomsdayâ and the upcoming Vision series âVisionQuest,â plus the new âX-Menâ cast reveal.
#10. Ella Rubin |
Gained: +689.5K followers
August total: 774.2K followers
Rubin starred in âSterling Point,â which premiered on Amazon Prime Video on Aug. 5 as a No. 1 global hit and was renewed for a second season by Aug. 20.
The D23 Effect
Four of the 10 accounts trace directly back to Disneyâs D23 Expo, held Aug. 14-16 in Anaheim, California, all confirmed via Disney, Marvel, and Deadlineâs event coverage:
- Sadie Sink: Promoted the new âX-Menâ film after debuting as Jean Grey in âSpider-Man: Brand New Day.â
- Robert Downey Jr.: Appeared for the new âAvengers: Doomsdayâ footage.
- Marvel Entertainment: Account served as a hub for the full weekend of reveals.
- Inde Navarrette: Revealed as Rogue on the same D23 stage as Sink, in the same âX-Menâ cast announcement.
Data from , 2026
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