In Hollywood, it doesn't get much more "grown up" than being a producer -- when it's your money, or at least your reputation, that's on the line.

So while her character has definitely become an adult in "Castle," she did the same as a Hollywood entity last year when she produced and co-starred in "Welcome to Happiness," an ensemble-cast independent comedy co-starring Nick Offerman (of "Parks and Recreation" fame), Paget Brewster (previously of "Criminal Minds") and Keegan-Michael Key (the first half of "Key & Peele"), among others.

Otherwise, her roles outside of "Castle" have remained fairly small so far.

She's done a number of short films in recent years, including three last year alone. She also did a comedic guest spot in the oddball YouTube series "Princess Rap Battle," playing the character Hermione Granger from the Harry Potter books in a rap music standoff against the character Katniss Everdeen from the Hunger Games novels.

All of those were fairly brief commitments, which could reflect the fact that she's still signed to "Castle."

In terms of "meatier roles," her biggest so far would have to be the titular Gretel in the 2013 film "Hansel & Gretel Get Baked," but there was nothing grownup about that one.

Not only is she recreating the role of a famous fairy-tale child (though in the film the character is a young adult), but the film is part of the stoner-comedy genre, which appeals to the juvenile in all of us ("Get Baked," in this case, is a pun referring to both the fact that a witch tries to cook and eat Hansel and Gretel in the fairy tale, and to the popular slang phrase for using marijuana, which figures heavily into the plot).

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