who plays the voice of mabel on gravity falls
Kristen Schaal Kristen Joy Schaal (/ʃɑːl/;[3] born January 24, 1978) is an American actress, voice artist, comedian and writer best known for current roles as Louise Belcher in Bob's Burgers (since 2011) and Carol in The Last Man on Earth (since 2015), as well as for playing Mel in Flight of the Conchords, the over-sexed nurse Hurshe Heartshe on The Heart, She Holler and Mabel Pines in Gravity Falls.