The third night of the Democratic National Convention in Chicago was packed with stars.

There was no shortage of big names and big speeches, including actress Mindy Kaling (who gave a shout-out to Ben Affleck), TV icon Oprah Winfrey (who gave a shout-out to the so-called “childless cat lady”), and former President Bill Clinton.

But the star of the show Wednesday evening, especially when his father took the DNC stage, was Gus, son of Democratic vice presidential candidate and Minnesota governor Tim Walz.

Shortly after Governor Walz accepted his party's vice presidential nomination, the father of two shared a touching story of how he and his wife Gwen were able to raise a family.

“Even if you've never been through the hell of infertility, I guarantee you I know someone who has,” Walz said to the raucous crowd inside the United Center. I remember praying every night for the call to come in.” The pit in my stomach when the phone rang, and the absolute agony when I heard that the treatment hadn't worked. [It took Gwen and I many years, but we were able to get fertility treatments. And when our daughter was born, we named her Hope,” he continued.

“Hope, Gus, Gwen, you guys are my whole world.

At this moment, the crowd erupted in applause, and Waltz's son Gus stood up, openly crying, pointing to his father and shouting: “That's my dad!”

Gus' reaction quickly spread, and the hashtag #thatsmydad trended on X (formerly Twitter).

“All us childless cat ladies have become Gus Waltz's adopted aunts. Not one of us flinched at his tears or screams,” commented another. 'Do you know how rare this is? They are not just good people, they are extraordinary parents and role models.”

“I want to inspire my children so much that when they see me speak of the dreams and passion I have for our country, they are moved to tears like Gus Walz,” another posted.

Earlier this month, Governor Walz and his wife opened up about their son, who has a nonverbal learning disability, anxiety disorder, and attention deficit/hyperactivity (ADHD) disorder, in a statement to People.

“As our youngest son Gus grew up, it became increasingly clear that he was different from his classmates,” the couple told the publication. 'Gus preferred to play video games and spend more time alone. When he became a teenager, we learned that Gus had a nonverbal learning disability in addition to an anxiety disorder and ADHD.

“Like many American families, it took us some time to figure out how to do everything we could to help Gus succeed as he grew up,” the couple continued.

“It took time, but it soon became clear to us that Gus' condition was not a setback, but his hidden strength.”