The actress also reunited with her 'Glee' co-star, Jonathan Groff.
On Tuesday via her Instagram Stories, the 34-year-old actress-singer shared a black-and-white photo of Monteith, who died of a drug overdose in 2013.
In the pic, Monteith, who played her love interest, Finn, on Glee and whom she was dating at the time of his death, is waving at a crowd of people. She captioned the post with a small red heart emoji.
Glee actress Jenna Ushkowitz also posted a photo in remembrance of Monteith.
The anniversary of Monteith's death comes just days after the one-year anniversary of the death of fellow Glee star Naya Rivera. Rivera was found dead after she went missing while boating with her then-4-year-old son, Josey, on Lake Piru in California.
Michele also paid tribute to Rivera last week with a black-and-white image posted to her Instagram Story.
Several members of the Glee cast reunited last week to celebrate Rivera's life. Though Michele wasn't one of them, she did have a Glee reunion of her own.
Michele shared photos of her best friend, Jonathan Groff, with her and husband Zandy Reich's son, Ever, writing, "More from the weekend."
She also posted a selfie with Groff, writing, "Best weekend with my best friend."