Want to support Save the Children and have a chance to attend the Guardians of the Galaxy Vol. 2 premiere? All you have to do is show off your Marvel Studios Hero Acts!

Marvel Studios has been donating $5 to Save the Children for every photo uploaded to MarvelStudiosHeroActs.com since October, but now through December 10, they’re increasing the donation to $15 per photo. Plus, sharing your photo on Facebook and Twitter will result in another $30 donation ($15 each).

That means you can raise up to $45 per photo. Each photo is also an entry to win a trip to the Guardians of the Galaxy Vol. 2 premiere! You can enter up to 100 times, which means that if you actually enter the maximum number of times and share each photo on Facebook and Twitter, you could personally raise up to $4,500 for Marvel Studios to donate to Save the Children!

Be a true Marvel hero and maybe you’ll meet Chris Pratt like a familiar face did in the video above.