Birthday: May 11, 1982

Age: 30

No. 1 Song in 1982: 'Physical' by Olivia Newton John

Other Notable Stars Born in 1982: Seth Rogen, Jessica Biel, Adam Lambert, Kate Middleton

On 'Glee,' Cory Monteith plays Finn Hudson, who is roughly 18 or 19 years old. This is quite the stretch for Monteith, seeing as he is about 11 or 12 years older than his character. His co-star Mark Salling is also 30 years old, but we were really shocked to find out Monteith was three decades old, since he still has his boyish good looks.