The actress was subject of internet rumours in recent days that she and boyfriend Cory Monteith were expecting their first child together.
Michele took to Twitter on Monday (October 22) to make light of the online speculation.
"My first fake pregnancy rumour! I've finally made it," she joked.
Michele and her Glee co-star Monteith were first linked earlier this year, with a friend saying that the actor is having "a positive effect" on Michele.
The actress has since said that she loves working with boyfriend Monteith on Glee, explaining: "He really, really inspires me, and he motivates me and I think he's just so talented."
Glee airs Thursdays at 9/8c on Fox.