Michael Ausiello
November 13, 2009 AT 07:19 PM EST

Further proof that Castle is growing into something of a hit: The guest stars are getting more recognizable!

Ex-Charmed sorceress Alyssa Milano has signed on to play a former love interest of Nathan Fillion’s title character, sources confirm to me exclusively.

Here’s the sitch: Castle reconnects with Kyra (Milano) on her wedding day and sparks fly. Beckett (Stana Katic) picks up on the obvious connection between the two of them, setting up a fun little love triangle.

Milano’s episode, titled “A Rose for Everafter,” shoots next week and will air in early 2010.

Castle recently received a full-season pickup from ABC.

Thoughts on a Fillion-Milano pairing? Head to the comments!

PHOTO CREDIT: Milano: Donna Ward / PR Photos; Castle: ABC

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