The year on Twitter belonged to global pop sensation BTS.

In Twitter's 2018 year in review, BTS ranked No. 1 on the lists of most-tweeted about celebrities and most-tweeted about musicians.

Kanye West, Drake, EXO, Ariana Grande, Cardi B., Beyonce, Jimin Park and Nicki Minaj were the other stars included on the lists.

2018's Most Tweeted about musicians(Twitter) 2018's Most Tweeted about musicians
2018's Most Tweeted about celebrities(Twitter) 2018's Most Tweeted about celebrities

BTS, a South Korean–based group, made its U.S. morning show debut on "GMA" in 2018 and has continued to take the world by storm. The group sings about school bullying, politics and mental health and its message for the world is one of love and acceptance. Its fans, dubbed the "BTS ARMY," have become a global force as well.

But that wasn't all that happened on Twitter in 2018.

"Twitter is the place to see conversations and connections happening daily," Nola Weinstein, global head of culture, engagement and experiential at Twitter, told "GMA." "Sometimes Twitter helps make the world feel a whole lot smaller."

That was more than the case in #TheRoyalWedding, where a worldwide audience RSVP'd "yes" to hear Prince Harry and Meghan Markle say "I do." (In fact, Prince Harry whispering, "You look amazing. I’m so lucky.” took the spot for most retweeted “GMA” tweet of 2018 with over 9 million views).

In TV and streaming, "SNL" scored the top spot and "Game of Thrones" remains on the list of most-tweeted about shows of 2018, with the series finale coming in 2019.

"13 Reasons Why," "Stranger Things," "Black Mirror," "Queer Eye" and "The Handmaids Tale" round out the top 5 most-tweeted about streaming shows.

2018's Most Tweeted about TV shows(Twitter) 2018's Most Tweeted about TV shows

Marvel dominated the box office conversation on Twitter in 2018. "Black Panther" led the pack of the most-tweeted about movies of the year, followed by “The Avengers: Infinity War.” (Disney is the parent company of ABC News and Marvel).

2018's Most Tweeted about movies(Twitter) 2018's Most Tweeted about movies

In Sports, King James reigned as the most-tweeted about athlete of the year, while the Cleveland Cavaliers were the most-tweeted about sports team of 2018.

2018's Most Tweeted about athletes(Twitter) 2018's Most Tweeted about athletes
2018's Most Tweeted about sports teams(Twitter) 2018's Most Tweeted about sports teams

2018 was also a big year for a conversation in politics. As the midterm elections took place in November, President Trump was the first on the list of most-tweeted about elected officials both before and after the midterm election, and also is the No. 1 most-tweeted about political figure of 2018.

2018's Most Tweeted about US political figures(Twitter) 2018's Most Tweeted about US political figures
2018's Most Tweeted about elected officials or candidates before election day(Twitter) 2018's Most Tweeted about elected officials or candidates before election day
2018's Most Tweeted about Elected Officials or Candidates since Election Day(Twitter) 2018's Most Tweeted about Elected Officials or Candidates since Election Day

Finally, Twitter grew as a place for voices to be heard in 2018. #MarchForOurLives, #BlackLivesMatter, the Students Stand Up campaign, the NFL National Anthem protests and the #MeToo movement were among the most-tweeted about movements and causes that did and continue to dominate the conversation on Twitter this year.

2018's Most Tweeted about movements(Twitter) 2018's Most Tweeted about movements