WHILE many actresses fantasize about wearing Valentino or Zac Posen on the red carpet, Ellen Page has a completely different idea.

“I always want to dress up like an animal or something really obscure, like a carrot or a wrench,” she said last weekend. “That would be awesome.”

True to her insouciant nature, she was strolling through the Theater District in a classic Members Only jacket and knit cap, looking very downtown. Ms. Page, the young star of the new coming-of-age film “Juno,” was on her way to see her first Broadway show, along with Maud Deitch Rohrer, her best friend from her hometown Halifax, Nova Scotia.

In “Juno,” which opened on Dec. 5 in limited release, Ms. Page plays a teenage outsider who gets pregnant by her best friend, played by Michael Cera from “Superbad.” Her growing belly was played, alternately, by foam inserts and a heavy prosthetic. “That,” Ms. Page said, “was incredible. It was almost like a corset in the back.”