0214_marionChristopher Nolan likes to keep it in the family -- because they just cast his 3rd "Inception" star in the next "Batman" movie.

Marion Cotillard, who is currently pregnant, reportedly signed on to "The Dark Knight Rises" Saturday.

With a baby due in April, Marion wouldn't start shooting in London until mid-June, before heading to the US to complete filming in the summer.

Cotillard joins "Inception" stars Tom Hardy, Joseph Gordon Levitt in the flick, which also stars Christian Bale, Morgan Freeman, Gary Oldman, Michael Caine and Anne Hathaway.

It's unclear who Marion's been cast as, though internet rumors point towards Thalia Al Ghul, the daughter of Liam Neeson's villainous character from Nolan's first movie, "Batman Begins."

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