PARK CITY, Utah — Duty calls for Alexandria Ocasio-Cortez.

The polarizing young congresswoman will not be heading to Sundance Film Festival for Sunday's premiere of "Knock Down the House," a documentary she's featured in, due to the federal government reopening.

"For almost two years, a mom followed several women as we ran for Congress. I was one of them," Ocasio-Cortez tweeted Saturday, referring to the movie's director, Rachel Lears. "Due to complications from the gov shutdown, I’m sad to say I’ll miss (the) premiere of Knock Down the House. This film was made, with love, for people."

Ocasio-Cortez, 29, continued by sharing a short clip from the documentary, which also follows then-congressional candidates Amy Vilela, Cori Bush and Paula Jean Swearengin. In it, she says that "when someone looks at me, the bias would be to not take me seriously – until I open my mouth."

"Knock Down the House" is one of the most-anticipated documentaries out of this year's Sundance Film Festival, whose nonfiction lineup has also included projects on fallen movie mogul Harvey Weinstein, famed sex therapist Dr. Ruth and the molestation accusations against late singer Michael Jackson.

Ocasio-Cortez, a progressive Bronx native, is frequently in the news, making headlines earlier this month for a viral video of her dancing to Phoenix's "Lisztomania" in college.