`Harry Potter` star Daniel Radcliffe and girlfriend Erin Darke are lending their support to their industry. The couple, both actors, joined other SAG-AFTRA union members striking in New York City, with the `Miracle Workers` star, 33, wearing his 4-month-old son in a carrier on his chest.

Darke, 38, held a strike sign as the pair and their baby boy walked the picket line, reports People magazine.