But the resilient actress is getting on with her life – and is pushing on with filming scenes for the upcoming series of the hit show.
Michele flashed a smile in a Twitter pic she posted of herself on location as her character Rachel Berry in New York, posing under a billboard for musical Funny Girl.
She's already got through the difficult task of filming a tribute episode to her late boyfriend, who played Finn Hudson in the show.
The cast have been working hard to support and comfort each other after Cory's untimely death from a heroin and and alcohol overdose in mid-July, and Lea is said to be doing an "amazing" job at holding her co-stars together.
The fifth season of Glee will premiere in the US on 26 September and will air a special memorial episode for Cory on 10 October.