Photo by Eugene Gologursky/Getty Images for Time Warner Cable

Paul McCartney has lent his name to the first Worldwide Everyone Matters Day, set for Wednesday (April 2nd). McCartney kicked off the #IAM campaign with his selfie affirming: "I am a Scouser."

This global campaign advocating dignity and respect launched in 2012. The organization's website proclaims, "Appreciating others -- and ourselves -- as we are" is the day's motto. Between 75 and 100 schools in the U.S. and abroad have organized "Everyone Matters Day" for this school year, many on April 2nd. The mission is to bolster self-pride and curb bullying and negative name-calling.

McCartney joins fellow celebrities Ellen DeGeneres, George Clooney, General Colin Powell, Kevin Spacey, Hugh Jackman, Tom Brokaw, Nicole Kidman, Daniel Craig, Natalie Portman, Debra Messing, Mary Tyler Moore, Betty White and Fran Drescher in support. A number of locations around the U.S. have announced their participation -- among them Los Angeles, Seattle, Dallas, Washington D.C., Atlanta, Minneapolis, Memphis, Portland, Phoenix, Denver and the state of Maine.