This week is all about celebrities doing good.

There's Scarlett Johansson trying to bring awareness to Rwanda and promote recycling.

There's Brad Pitt fighting for equality!

And, now, there's Denzel Washington, Shaquille O'Neal, Martin Sheen, and Wesly Clark helping the communities.

The four stars all happened to attend the Boys & Girls Clubs of America as children.

Now, they're lending their childhood photos to be part of a national campaign.

On Wednesday, the campaign "BE GREAT" was revealed. It's asking for people to volunteer their time to help their local B&GC.

Denzel, who is the national spokesman for the organization, told reporters, "What's going on with children doesn't worry me. What's going on with adults worries me. If we are not more committed to these young people … they will go as far as we take them, so the onus is on us, not on the children."

He added, "We've created this world for them, we are the ones that fall and we are the ones that can rectify it."

And, during the launch event yesterday, Denzel displayed his ad which featured a photo of himself from second grade.

The headshot shows him in a collared shirt, with a tie and blazer, which was a bit how he was dressed like during the event.

To which he added, "A handsome young man that is. I have to give credit where credit is due, that begins with my mother not only for giving me life and faith and so much support, but also digging up this photo."

It's always good to give back!

[Image via AP Images.]