ET's Kevin Frazier joins ABC actors from "Grey's Anatomy" and "Ugly Betty" at opening night of "Grey's" star Chandra Wilson's Broadway debut as Matron "Mama" Morton in Chicago -- her costars even reveal what they've heard regarding who's returning to the show next season.

Actor James Pickens Jr., who plays "The Chief" Dr. Richard Webber on "Grey's," says the cast is always hearing rumors on who's coming and going on the show. "You probably know better than I do," he tells Kevin.

Sara Ramirez, who plays Dr. Callie Torres, showed up in support of her "Grey's" costar as did actor T.R. Knight. "I love Chandra Wilson," Ramirez tells ET.

For more with the "Grey's" cast and for a baby update from "Ugly Betty" actress Ana Ortiz, watch the video above!