Lady Gaga, Katy Perry, and Oprah Winfrey are just some of the celebrities who will appear at Kamala Harris’ Pennsylvania rallies on Monday night (Nov. 4), the Harris campaign has announced.

The two rallies will take place simultaneously, with both the Philadelphia and Pittsburgh events running from 5pm—10pm EST, with Harris slated to appear in person at both.

The Harris campaign has also revealed the special guests who will be appearing at each rally, with the Pittsburgh event featuring Andra Day, DJ Arie Cole, D-Nice, and Katy Perry.

Meanwhile, the Philadelphia rally is a rather stacked affair, with DJ Jazzy Jeff, Fat Joe, and Oprah Winfrey appearing as guest speakers, while Adam Blackstone, DJ Cassidy, Freeway and Just Blaze, Jazmine Sullivan, Lady Gaga, Ricky Martin, and The Roots serve as special musical guests.

“It’s time to get ready to vote–I’ll see you guys in Pennsylvania,” Lady Gaga shared in a brief video shared to Instagram alongside the announcement of the rallies.

Harris’ previous campaigns have recruited a number of high-profile celebrities in recent weeks, including Bruce Springsteen, Jennifer Lopez, Beyoncé, Cardi B, and more.

“I understand folks have different opinions about things, but this election is about a group of folks who want to fundamentally undermine our American way of life,” Springsteen said to those in attendance at an earlier Philadelphia rally last week (Oct. 28). “Donald Trump doesn’t understand this country, its history, or what it means to be deeply American.”

Ahead of Lady Gaga, Katy Perry, and others being announced for the Election Day eve rallies, rumors had swirled that Taylor Swift may have been booked to appear, with the Pennsylvania native having thrown her support behind the Harris campaign in September, just hours after the first Presidential Debate.

“Like many of you, I watched the debate tonight. If you haven’t already, now is a great time to do your research on the issues at hand and the stances these candidates take on the topics that matter to you the most,” Swift wrote. “As a voter, I make sure to watch and read everything I can about their proposed policies and plans for this country.”