Saturday Night Live star Beck Bennett has been cast as Keanu Reeves' younger brother in Bill & Ted Face the Music, which is bringing back Amy Stoch (Dallas) and Hal Landon Jr. (The Artist) as Bill's stepmom Missy and Ted's disciplinarian father, respectively. Meanwhile, Jayma Mays (Glee) and Erinn Hayes (Childrens Hospital) have signed on to play Bill's wife, Princess Joanna, and Ted's wife, Princess Elizabeth, Collider has confirmed. Princesses Joanna and Elizabeth were previously played by Diane Franklin and Kimberley LaBelle in Bill & Ted's Excellent Adventure, and by Sarah Trigger and Annette Azcuy …