Jennifer Morrison

Jennifer Morrison may be taking on the mother of all roles.

The former House star joins the cast of How I Met Your Mother as Zooey, a new love interest for Ted (Josh Radnor), according to Entertainment Weekly.

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Described by executive producer Craig Thomas as "the biggest female character" ever added to Ted's life, Zooey is an activist trying to stop the destruction of a building that will be replaced by one of Ted's designs.

There's no word yet on how long Zooey will be sticking around, but producers told EW it will be a "huge arc" this season.

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Reps for the CBS series did not immediately respond to TVGuide.com's request for comment.