Gadot, who will be making her first "SNL" appearance, starred in summer's #1 film, "Wonder Woman," which earned more than $400 million at the domestic box office. Gadot will next co-star in the highly anticipated "Justice League," arriving in theaters Nov. 17.Joining Gadot will be Grammy-, Oscar- and Golden Globe-winning artist Sam Smith, marking his second visit to "SNL" as musical guest. Smith dropped a new single, "Too Good at Goodbyes," on Sept. 8 in preparation for his upcoming second studio album release.