There is more than one artist with the name John Reilly 1) John Reilly (1926-69) was an Irish traditional singer. 2) John Reilly, better known under his full name John C. Reilly. In 1998, Reilly appeared, along with Giovanni Ribisi and Winona Ryder, as Jon Spencer Blues Explosion in their video Talk About The Blues. In 2002, he played the role of Amos Hart, Roxie Hart's naïve husband, in the musical film Chicago. In 2006, he performed two songs on Rogue's Gallery: Pirate Ballads