Democratic Rep. Alexandria Ocasio-Cortez of New York fired back at Republican lawmakers who she said booed as she cast her vote for Rep. Nancy Pelosi to become the next House speaker.

"Over 200 members voted for Nancy Pelosi today, yet the GOP only booed one: me," Ocasio-Cortez said on Twitter. "Don't hate me cause you ain't me, fellas."

It was unclear from the video who made the noise in the room, which included Congress members' spouses and children.

Ocasio-Cortez and her Democratic colleagues around her glanced over at the direction of the noise and shared a laugh.

Democratic Rep. Alexandria Ocasio-Cortez of New York on Thursday fired back at Republican lawmakers who she said booed as she cast her vote for Rep. Nancy Pelosi of California to become the next House speaker.

"Over 200 members voted for Nancy Pelosi today, yet the GOP only booed one: me," Ocasio-Cortez said on Twitter. "Don't hate me cause you ain't me, fellas."

The House of Representatives, including roughly 100 newly elected lawmakers, voted on the next speaker at about 1:30 p.m. on Thursday. When Ocasio-Cortez verbally cast her vote, a noise that sounded like "boo" could be heard in the House chamber.

It was unclear from the C-SPAN video of the event who made the noise in the chamber, which included Congress members' spouses and children. However, Michael Barbaro, the host of The New York Times' podcast "The Daily," said in a tweet that Republicans "gently and playfully" booed Ocasio-Cortez.

Ocasio-Cortez and her Democratic colleagues around her glanced over at the direction of the noise and shared a laugh. Ocasio-Cortez's office did not immediately respond to requests for comment on Thursday night.

Ocasio-Cortez, who in November became the youngest woman elected to Congress, is perceived by many as a rising star in politics and describes herself as a democratic socialist. Conservative personalities have since focused on criticizing her views — and she frequently responds with quips on social media.

Democrats, who now have a majority in the House of Representatives, elected Pelosi speaker over Republican Rep. Kevin McCarthy of California. Fifteen broke from the party and did not vote for Pelosi.

Pelosi's reelection briefly appeared to be in question following the midterm elections, after numerous House Democrats called for new leadership ahead of the new Congress. Ocasio-Cortez, who put pressure on Pelosi to forcefully address climate change, said she would back Pelosi's bid if she "remains the most progressive candidate for speaker."

Watch the video from C-SPAN: