Glee Stars: How Old Are They Really? 10 of 20 Prev Autoplay Next Tweet April 23, 2013 at 09:00AM EDT by Beth Douglass Related: Glee, Lea Michele , Cory Monteith , Chris Colfer , Heather Morris , Naya Rivera , Harry Shum Jr. full size Credit: Splash News How Old is Lea Michele? Name: Lea Michele (Rachel) Age: 25 years old Birthday: August 29, 1986Here’s one more Glee star who is also 25! There certainly are a lot of them, aren’t there? The oldest of the quarter-lifers, Lea be 26 in just a few months.