Photo by Dan Hallman/Invision/AP
Rowling joined Twitter in 2009, after discovering she was being impersonated on the social media site, the Telegraph reported.
Though the author has only tweeted 1,356 times in six years, she's managed to pick up 4.97 million followers, Washington Post noted.
In addition to followers, Rowling has also gained a reputation for using the social media platform to defend and discuss important social issues.
Recently, Rowling made headlines after a Twitter troll dissed the 2015 Wimbledon champion, Serena Williams.
Here's a look at Rowling's reaction to a user who said Williams is "built like a man."
.@diegtristan8 "she is built like a man". Yeah, my husband looks just like this in a dress. You're an idiot. pic.twitter.com/BCvT10MYkI
- J.K. Rowling (@jk_rowling) July 11, 2015
Williams isn't the only person Rowling has supported on Twitter.
After Madonna fell onstage during a performance at the 2015 Brit Awards, Rowling praised the singer for getting back up and continuing to perform. She even used the hashtag #TeamMadonna.
Are you the sort of person who gloats when they see a woman fall, or the kind that celebrates a magnificent recovery? #TeamMadonna
- J.K. Rowling (@jk_rowling) February 27, 2015
.@anakocovic21 Maybe because gay people just look like... people?
- J.K. Rowling (@jk_rowling) March 24, 2015
.@claraoswiin But of course. pic.twitter.com/Galu47MT4X
- J.K. Rowling (@jk_rowling) December 16, 2014
In celebration of Ireland's legalization of gay marriage, Rowling tweeted about a wedding between Albus Dumbledore and and Gandalf from "The Lord of the Rings."
.@justaoifethings ???????? Then they could get married IN IRELAND! ???????? pic.twitter.com/yXedPavZfp
- J.K. Rowling (@jk_rowling) May 23, 2015
I don't care about WBC. I think it's important that scared gay kids who aren't out yet see hate speech challenged. https://t.co/XumjDmEjuw
- J.K. Rowling (@jk_rowling) May 27, 2015
I was born Christian. If that makes Rupert Murdoch my responsibility, I'll auto-excommunicate. http://t.co/Atw1wNk8UX
- J.K. Rowling (@jk_rowling) January 11, 2015
.@sjosiah0 The Internet doesn't just offer opportunities for misogynistic abuse, you know. Penis enlargers can also be bought discreetly.
- J.K. Rowling (@jk_rowling) May 8, 2015
Keep RTing, wonderful people, and if you're in the UK don't forget to keep an eye out for the missing. @missingpeople #TheBigTweet
- J.K. Rowling (@jk_rowling) May 25, 2015
When actor Matthew Lewis, best known for playing dorky wizard Neville Longbottom in the "Harry Potter" film, posed half-dressed in a magazine spread, Rowling jokingly chided the former child-star.
"Now go put some clothes on," Rowling tweeted at Lewis.
.@Mattdavelewis I will always support you whatever you want to do, Matthew. Now go put some clothes on.
- J.K. Rowling (@jk_rowling) May 21, 2015