Mark Ruffalo is encouraging people to pay it forward in a unique way.
He shared a screenshot of a $100.00 Starbucks gift card on Twitter, encouraging people to enjoy a drink on him.
Ruffalo also encouraged people to add on the gift card.
"Just wanted to thank you all for being the best people you can be each and everyday," he tweeted.
Good morning!☀️ Just wanted to thank you all for being the best people you can be each and everyday. Please enjoy a drink on me. I encourage you to add on to this gift card. Happy Holidays everyone! #PayItForwardChallengepic.twitter.com/cxoRNeBe80
— Mark Ruffalo (@MarkRuffalo) December 19, 2017