Juggling motherhood and movie-making took its toll on Katherine Heigl.

Katherine says filming "Life As We Know It" was "a complete blur" because she and husband Josh Kelley had just adopted baby Naleigh and were still learning how to be a mom.

Heigl tells Redbook,"If I spread myself too thin, I’m not a good actor, I’m not a good mother, and I’m just really high-strung—and everybody hates me.”

Though Naleigh was adopted from South Korea, Katherine adds, "We still talk about having biological children as well."

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