Cory Monteith & Mark Salling: 'Glee' Guys on Set

Cory Monteith and Mark Salling walk around the set of Glee on Friday (February 17) in Los Angeles.

The co-stars, both 29, can next be seen in the show’s winter finale, which airs this Tuesday (February 21) at 8/7c on FOX.

Late last month, Mark chatted with E! Online about how he’s able to play a teenager even though he’s approaching 30 in real life.

“I’m 17, so I’ll let you know,” he joked. “Well, 30-17 I think is the terminology. They can put makeup on you on TV.”

In case you missed it, check out the Glee cast covering Kelly Clarkson‘s “What Doesn’t Kill You (Stronger)“!