John Edward Cariani is an American actor and playwright. Cariani is best known as the forensic expert Julian Beck in Law & Order. On stage, he earned a Tony Award nomination for his role as Motel the Tailor in the 2004 Broadway revival of Fiddler on the Roof. He is also known for his roles in Broadway shows Something Rotten! and The Band's Visit, and for writing Almost, Maine, one of the most produced plays in American high schools.

Something Rotten! is a musical comedy with a book by John O'Farrell and Karey Kirkpatrick and music and lyrics by Karey and Wayne Kirkpatrick. Set in 1595, the story follows the Bottom brothers, Nick and Nigel, who struggle to find success in the theatrical world as they compete with the wild popularity of their contemporary William Shakespeare.