During MSNBC's live coverage Tuesday afternoon, the 55-year-old "Ant-Man" and "Only Murders in the Building" star was spotted carrying a case of water bottles and sharing them with Philadelphia voters lined up at Temple University's polling location.
After he was approached by NBC News Political and National correspondent Jacob Soboroff, Rudd explained, "I just wanted to give people water. They're waiting in line for a long time, and it's a wonderful thing that all these young people are out voting."
According to the Philadelphia Inquirer, the wait was up to two hours long at polling places near Philadelphia-area colleges. Per the Inquirer, Rudd also visited Villanova University.
"We've been doing lots of stuff today here in Pennsylvania, and we wanted to come out and tell these students they're doing really great things," Rudd added.
Last week, several of Rudd's "Avengers" co-stars lent their support for Vice President Kamala Harris' presidential campaign in a video Robert Downey Jr. - aka Iron Man - posted on social media.
Downey, Don Cheadle, Scarlett Johansson, Mark Ruffalo, Paul Bettany, Danai Gurira and Chris Evans appeared in the Zoom-style video chat clip and had a lively debate about a catchphrase for the Harris-Walz campaign.
The Avengers, including Rudd, also assembled for a virtual fundraiser benefitting Joe Biden and Harris' campaign in 2020.
On Election Day eve, Lady Gaga, Katy Perry, Christina Aguilera, James Taylor, Jon Bon Jovi and Ricky Martin were among the celebrities that lent their star power to Harris Monday night.
The musicians roused crowds across the country with performances and shared why they were casting their vote for Harris. "Kamala Harris is for us. She's for unity, she's for all Americans," Martin told a Philadelphia audience while Aguilera encouraged fans in Las Vegas to "vote for freedom."
In Philadelphia, Lady Gaga introduced Harris' husband, Doug Emhoff, and performed "God Bless America."
"For more of this country's life, women didn't have a voice. Yet we raised children, we held our families together, we supported men as they made the decisions. But tomorrow, women will be part of making this decision," Gaga said. She added that she believed Harris would be a president "for all Americans."
