'Glee' star Cory Monteith -- who plays Finn Hudson on the popular series -- has entered rehab. The actor, who is dating his co-star Lea Michele in real life, has entered a facility on a voluntary basis to address an addiction to an unnamed substance.

Monteith, 30, has admitted to previous struggles with substance abuse. He revealed that he sought a course of treatment via rehab when he was just 19.

As for his current stint, Monteith's rep told PEOPLE that the star has "has voluntarily admitted himself to a treatment facility for substance addiction. He graciously asks for your respect and privacy as he takes the necessary steps towards recovery."

It's honorable that Monteith has been vocal about his personal struggles. He wants to help others who have the same problem, and to make sure he doesn't send the wrong message to the kids who are fans of the hit show on which he stars.

In 2011, he said, "I don't want kids to think it's okay to drop out of school and get high, and they'll be famous actors, too. But for those people who might give up: Get real about what you want and go after it."

'Glee' execs have voiced their support for the actor, as well. Fox issued a statement backing Monteith through this critical period. It read as follows: “Cory is a beloved member of the Glee family and we fully support his decision to seek treatment. Everyone at the show wishes him well and looks forward to his return.”

Additionally, Michele expressed how "proud" she is that her beau is seeking help, telling PEOPLE, "I love and support Cory and will stand by him through this. I am grateful and proud he made this decision."

We wish Monteith the best as he addresses his issues.

As for 'Glee,' it looks like Monteith will be sitting out the last few episodes of Season 4.

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