As President-elect Barack Obama spent the day before his historic inauguration visiting homeless youth and doing service, some celebrities are following suit. Ben Affleck, among a list of other stars, came together Monday in Washington, D.C., for a good cause.

Affleck, joined by Martin Luther King III, actor David Arquette and musicians Herbie Hancock and Josh Groban, turned out to the National Hunger Rally hosted by Feeding America.

The national rally against hunger, which took place at the Martin Luther King Library on Martin Luther King Jr. holiday, featured a joint performance by Hancock and Groban.

Arquette chairs Feeding America's Entertainment Council, according to the organization's website. Feeding America is a national domestic hunger-relief charity.