“The Skeleton Twins” features Kristen Wiig and Bill Hader lip-syncing Starship’s “Nothing’s Gonna Stop Us Now” to each other, and that’s probably all you need to know. Wiig and Hader play twins who haven’t spoken in 10 years but reunite after both narrowly escape death. The movie marks Hader’s first headlining role since his “Saturday Night Live” departure last year. He and Wiig will battle fellow “SNL” alum Tina Fey for the signature dysfunctional-family dramedy of the fall when “This Is Where I Leave You” opens on Sept. 19, the same day as “Skeleton Twins.” The latter also stars Luke Wilson and Ty Burrell. The movie won the Waldo Scott Screenwriting Award at Sundance in January. Watch the trailer below.