If you thought Anna Gunn's been looking particularly svelte and glowing lately, she has. The actress tells People that she was being treated for an illness while she was shooting "Breaking Bad," and that the treatments made her heavier. "I was actually ill while I was filming the show, and it affected my weight," Gunn tells the tab. "They gave me cortisone and I puffed up and gained weight. Now I'm better, thank God. … I'm doing fine, thankfully. I'm feeling really good." Now that she's back on track with her health, Gunn, who plays Walter White's wife, Skylar, on the show, says she stays in shape by doing Pilates -- and chasing after her two daughters.