Jack Black Creates An 'Anaconda' Theme Song Jack Black sings a song he just made up, which was inspired by his new film ‘Anaconda’. Together on Graham's sofa tonight: Hollywood comedy greats Jack Black and Paul Rudd, together at last in horror meta-reboot Anaconda; Jessie Buckley, talking about playing William Shakespeare's wife Agnes in the tragic drama Hamnet; and actress and comedian Michelle de Swarte, writer and star of hit BBC sitcom Spent. #GrahamNorton #JackBlack #Anaconda #Film | BBC