Hayward launches 'Daddy's Always Happy' charity campaign

Gordon Hayward's now-infamous gender reveal reaction has sparked a new charity campaign.

The Boston Celtics star has teamed up with online e-commerce platform Teespring to create a line of T-shirts featuring his "Daddy's Always Happy" catchphrase. A portion of the proceeds will go to the Massachusetts Society for the Prevention of Cruelty to Children, an organization that helps parents 21-and-under who can't afford baby necessities.

Related: Hayward wants Celtics fans to chant 'Daddy's always happy' at games

"Since the original video went viral, 'Daddy's Always Happy' has kind of taken on a life of its own," Hayward wrote on his website. "People are always saying it to me on social media or when I'm streaming on Twitch.

"For me, it's turned into a metaphor for being a parent, and all the responsibilities that go with it. On the one hand, you're happy and blessed to have your family. On the other hand, it's challenging and surprising and hard work in ways you can't imagine before becoming a parent. But ultimately, you have to embrace it and find the happiness that's right there in front you."

(Photos courtesy: Teespring)