Comedian Chris Rock, long outspoken about the issues of guns in American culture, is heading to Capitol Hill on Wednesday to support President Barack Obama’s new gun control package in the wake of the Newtown, Conn., shootings.

Rock, along with singer Tony Bennett, actress Amanda Peet, actor Adam Scott and actress Anna Deavere Smith will join a coalition featuring Rep. Mike Thompson, D-Calif., Mayors Against Illegal Guns and the Law Center to Prevent Violence at a press conference in the U.S. Capitol. The group is aligned with the website DemandAPlan.org, which, according to its website, pushes to “require a criminal background check for every gun sold in America,” “ban assault weapons and high-capacity ammunition magazines” and “make gun trafficking a federal crime.”