Who is Coming Between Glee's Kurt and Blaine?

Just when we thought Kurt (Chris Colfer) and Blaine (Darren Criss) were going to get to be happy for awhile...

Grant Gustin has joined the cast of Gleeas Sebastian, a Dalton Warbler and potential love interest for Blaine, TVLine.com reports. Just because he's a Warbler, doesn't make him a nice guy. In fact, he's described as the male version of Santana (Naya Rivera).

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Gustin, whose theater credits include West Side Story (very fitting!), will first appear in Episode 5 of the third season, which airs Tuesdays at 8/7c on Fox.

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