The singer/actress has confirmed long-standing rumours the couple once dated in her new book Brunette Ambition, after previously insisting the romance stories weren't true.
Michele, who at 27 is eight years younger than Morrison, comes clean as she recalls landing the role of Rachel Berry in the Tv musical.
In an extract of the new book obtained by Us Weekly, she writes, "When we shot the pilot, I met Cory Monteith, Kevin MCHale, Amber Riley, and Chris Colfer for the first time. I had worked on Broadway with Jenna Ushkowitz and Matthew Morrison before. Matt had been a friend of mine for years, and in fact we'd actually dated back in the day for a Broadway beat."
Michele previously insisted she and Morrison were never more than friends and the romance rumours were made up, and he also shot down the rumours of a pre-Glee fling with his co-star in a 2010 Parade interview, stating, "I got a call from my publicist (about it), and she got a call a minute later and we looked at each other like, 'What the f**k?' It's so laughable."
Michele went on to date Monteith, who died following a drug overdose last summer (13).