Bravo fans have never seen Luann de Lesseps like this before!

The Real Housewives of New York City alumna and Bravo's Love Hotel star has traded in her "Chic C'est La Vie" style for some 1912 garb for a guest role in Murdoch Mysteries — and PEOPLE has an exclusive first look.

Canada's historical crime series, which airs on Ovation TV in the U.S., is set in the early 20th century and follows the investigative work of Toronto police force detective William Murdoch (played by actor Yannick Bisson). Based on the Murdoch Mysteries novels by Maureen Jennings, the show has been airing for 18 seasons since its debut in 2008, and holds the record as Canada's longest-running drama series...

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