Chloë Grace Moretz attends the Coach Summer Party on the High Line in New York. (Evan Agostini/Invision/AP)

Chloë Grace Moretz is one of those actresses who is suddenly everywhere all the time, whether she's starring in a raunch-com opposite Zac Efron, feuding with Khloé Kardashian or speaking at the Democratic National Convention.

Yes, the 19-year-old actress and star of "Neighbors 2" landed one of the high-profile speaking gigs in support of Hillary Clinton at the convention in Philadelphia. Presumably, she's there to attract the millennial vote: Moretz has a huge following among her young fans on Instagram (9 million) and Twitter (2 million).

Not familiar with Moretz, also a Teen Choice Awards fixture? Here's what you need to know:

Where do I know her from?

That depends on your age group. Moretz, classified as one of Hollywood's recent young breakout stars, got her start in "The Amityville Horror" when she was just eight years old, though she moved on to more kid-centric movies, such as "My Friends Tigger & Pooh" and "Diary of a Wimpy Kid." Her true breakout role was in the 2010 film "Kick-Ass," based on the comic book; her part as Hit-Girl earned her three MTV Movie Awards for breakout performance, best hero and best badass star. (In teenage currency, those are very valuable distinctions.)

"30 Rock" fans may also recognize Moretz from her hilarious performance as Kaylie, Jack Donaghy's (Alec Baldwin) teen nemesis. She segued to less family-friendly films with a remake of "Carrie"; the tearjerker romance "If I Stay"; and the film adaption of Gillian Flynn's novel "Dark Places." This year, she was the lead role in "5th Wave," a drama capitalizing on the teen dystopian trend, and went up against Zac Efron and Seth Rogen in "Neighbors 2: Sorority Rising." And you may have seen she's been tapped to star in the upcoming reboot of "The Little Mermaid."

Is she political? 

Indeed, she's a vocal supporter of Clinton. While campaigning for Clinton in Las Vegas earlier this year, Moretz told People magazine that young women had confessed to her that they didn't want to be seen as "strict feminists" if they voted for Clinton."Don't be afraid to vote for Hillary just because she's a woman," Moretz said. "Vote for Hillary for the things that she stands for. Vote for Hillary for what she backs and what she supports."

Wasn't she recently involved in some Kardashian drama? 

Oh, yes. It all started in March when Kim Kardashian posted a nude selfie and Moretz wrote on Twitter: "I truly hope you realize how important setting goals are for young women, teaching them we have so much more to offer than just our bodies." (Kardashian's response: "Let's all welcome @ChloeGMoretz to twitter, since no one knows who she is.")

The feud continued last week after Kardashian leaked the now-infamous phone call between Kanye West and Taylor Swift on Snapchat. Shortly after, Moretz tweeted that "everyone in this industry needs to get their heads out of a hole and look around to realize what's ACTUALLY happening in the REAL world." Khloé Kardashian wrote back a NSFW tweet in response, so there's no love lost there.

So is she in Taylor Swift's squad?

No way — in fact, she apparently turned down the chance to join, even though they have a mutual friend in pop star Selena Gomez. Anyway, Moretz is not a fan of squads: "They appropriate exclusivity. They're cliques!" she told Complex.

Read more:

The 'Gone Girl' movie was a huge hit. So why did Gillian Flynn's 'Dark Places' flop so badly?

Read the secret Kanye West-Taylor Swift phone call that Kim Kardashian posted on Snapchat

Jokes from the 'Neighbors 2' trailer aren't in the movie. Should we be angry?