Instagram/Jack Black & Jack White Celebrity Jack Black hosts SNL with musical guest Jack White on April 4. A comedic and musical reunion not to be missed. March 23, 2026 AceShowbiz - Jack Black is set to return as the host of Saturday Night Live on April 4. The actor and musician will be joined by former White Stripes frontman Jack White, who will appear as the musical guest for the episode. This upcoming collaboration marks a reunion of sorts between the two Jacks, who previously worked together in 2019 on a song for the band Tenacious D.