Just one month before his tragic death, "Glee" star Cory Monteith visited girlfriend Lea Michele on set at her cover shoot for Marie Claire Mexico. In the magazine, on stands July 30, Michele opened up about their professional relationship and how it became something much more.

"It's more interesting having a relationship with someone you work with because we get more attention because we play boyfriend and girlfriend on the show and we are also in real life," she said. "But he is the best person I know, he has made my life so incredible and I am so thankful for him and not only to have him as a partner but also as a coworker."

"It is important to have someone that supports you and encourages you," she also noted of her healthy relationship. "Someone that makes you feel that you are unstoppable, that you can do anything in the world because you have him."

Monteith and Michele first met on the "Glee" set in 2009, but didn't start dating until one year ago.

Marie Claire Mexico Editor-in-Chief Ariadne Grant opened up about Michele's time on set with Monteith in an interview with E! News.

"Lea Michele arrived early with her beauty team and her agent and was always professional [and] dedicated," she said. "Her experience was obvious on the photo shoot but showed another side of her personality, softer and more innocent, on the interview when she got all excited with some questions, she said she loved Mexico so much. That side was even more evident when Cory showed up almost at the end of the session, she was very happy about him being there."

Grant added that Monteith was a gracious guest and kept it very low key.

"Cory showed up in great spirits and was very nice to everybody there; he even took pictures with whoever asked for it. He just asked for a Coke and stayed there watching the shooting until it was done," she said. "They were both very nice and obviously happy and in love." 

"We are very disrupted by the unfortunate and untimely events," Grant said of Monteith's July 13 death, caused by a drug overdose. "Our thoughts are with Lea."