Chris Pratt remembers when he found out his first season guest stint on the NBC sitcom "Parks and Recreation" -- as dimwitted layabout Andy, girlfriend to Rashida Jones's Ann -- was being turned into something permanent.
"(Showrunner) Mike Schur said, 'We have this nice cliffhanger, not knowing whether or not you come back,' " recalls Pratt. "I was like, 'And …?' He said, 'Oh, oh, we've got a five-year plan for Andy.' He said it like it was somehow not life-changing information. I went home and had a secret celebration."

Pratt's joy was partly because the move from guest actor to regular is special territory for an actor. It's a sign that he or she didn't just season a show's mix, but came off an essential ingredient.

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