Mark your calendar: Truthiness is coming to Congress on Friday. Stephen Colbert is scheduled to testify at a House immigration hearing, the Daily Caller is reporting.

A House Judiciary Committee spokeswoman told the DC the subcommittee hearing — titled "Protecting America's Harvest" — was a "serious issue . . . this is not a TV stunt." A Republican source said the host of Comedy Central's Colbert Report will testify "in character," which has some GOPers worried that he'll make light of a serious issue.

Stephen Colbert make light of a serious subject?

The DC explains the backstory about why Mr. Colbert is going to Washington: This summer he accepted the United Farm Workers' challenge to "Take Our Jobs," which offers Americans the chance to work in the fields doing the jobs often done by illegal immigrants.

Watch the hearing live Friday, beginning at 9:30 a.m. ET.

(Posted by Michael Winter)