Sully captured the heart of the nation in a touching image after former President George H.W. Bush's recent passing.
Bush's service dog was photographed lying in front of the former President's casket, capturing the heart of the nation.
Watch below as Anderson Cooper welcomes Sully to the CNN Heroes stage:
Luke Mickelson quit his high-paying job to build beds for kids who sleep on the floor.
He founded Sleep in Heavenly Peace, a nonprofit that builds and delivers beds to children in need. Tonight, he received his Top 10 CNN Heroes award and $10,000 toward his nonprofit.
Read more about Mickelson's work here and watch "CNN Heroes: An All-Star Tribute" tonight on CNN to see who is named CNN Hero of the Year.
Click here to donate to this cause and the others supported by the 2018 CNN Heroes Top 10.
Is he the host? A CNN Hero? Will Ferrell isn't sure -- but he isn't getting off the stage anytime soon. Watch now live on CNN TV or CNNgo.
The stars are out to celebrate this year's class of CNN Heroes. Check out these photos to get a glimpse of the red carpet.
Watch below: Actor Omari Hardwick shares why his grandfather is his hero
Watch: CNN's Brooke Baldwin chats with 'Black Panther' and 'The Walking Dead' actress Danai Gurira on the CNN Heroes red carpet
Each of the Top 10 CNN Heroes will get a $10,000 cash prize tonight to help their causes (read more about them here). And the soon-to-be-announced CNN Hero of the Year will receive an additional $100,000 for his or her cause.
You can contribute to any of these trailblazers' efforts by donating to their non-profit through this link.
Even better, if you donate to any of their 10 nonprofits via CNNHeroes.com and crowdrise.com/cnnheroes starting tonight at 8 p.m. ET, your donation will be matched by Subaru up to $50,000 per Hero. That matching donation offer lasts until January 2.
Update: Everyone's taking their seats so this red carpet livestream will be shutting down
Check out the CNN Heroes red carpet, where everyone who's attending tonight's event is making an appearance. (We're also using it for live broadcasting, so you might see a CNN host appear.)
Meet the 2018 CNN Heroes ahead of the star-studded tribute: