Pena, who was in "La Bamba" and "Rush Hour," will play Gloria's [Vergara] mother while Beatriz, who has appeared on TNT's "The Closer," will play her sister, Entertainment Weekly reported Friday.
"There's a bit of a competitive relationship between Gloria and her sister that will be fun," executive producer Christopher Lloyd told EW.
"The mother is the formidable, domineering character in the family, and has a complicated relationship with Jay [Ed O'Neill]. I'm not sure she's ever completely accepted Jay, and they lock horns in the episode."
The 12th episode, "Fulgencio," begins shooting Monday.