Sen. Patrick Leahy (Getty Images) and Christian Bale as Batman in "The Dark Knight Rises" (Reuters/Ron Phillips/Warner Bros).

Sen. Patrick Leahy seems to be an official part of the Caped Crusader franchise now. In “The Dark Knight Rises,” opening July 20, the Vermont Democrat has his fourth cameo in the “Batman” movie series.

Remember the last time, when he actually traded dialogue with Heath Ledger as the Joker in 2008’s “The Dark Knight”? (Leahy, as a gentleman at a party raided by the bad guys: “We’re not intimidated by you thugs.”)

Well, the right people must have been impressed, because they gave the lifelong “Batman” fanatic another speaking role. His spokeswoman, Carolyn Dwyer, would give us no spoilers other than that it’s in a scene filmed last summer with stars Christian Bale and Morgan Freeman.

Leahy will be honored at a Warner Bros. advance screening of the film July 15 in Williston, Vt. Proceeds will benefit Montpelier’s Kellogg Hubbard Library — where Leahy got his first library card, and to which he gives all his movie earnings — as well as a local aquarium.

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