Monteith died in a hotel room in Vancouver, Canada following a drug and alcohol-related overdose a year ago and on Sunday, the Glee star took to Twitter to honour the tragic actor.
Sharing a picture of Monteith on the beach on the social networking site, she writes: "We hold you in our hearts today, and every day we remember your smile. We will love you and miss you always."
Michele also posted a photo of herself and Monteith on Instagram.
The actress was not the only Glee castmember to pay tribute to Monteith on Sunday.
Actor Matthew Morrison writes: "I personally believe Cory was reborn into some other beautiful form a year ago today. I celebrate him and his life... Wherever that may be," while Amber Riley adds: "I remember your smile and your warm hugs! 1 year without you and your presence is still felt. Miss and love u everyday big bro Our Angel (sic)".