Mark Salling and Cory Monteith: Men in Black

Cory Monteith and Mark Salling suit up in black shirts and matching slacks with suspenders while filming an episode of Glee on Tuesday (August 24) in Los Angeles.

Mark, 28, kept it cool in shades while Cory, 28, capped off his ensemble with a black bowler hat.

Also pictured on set: Lea Michele, 23, chatting on the phone near a trailer and Mark helping himself to some food.

“Boy that craft service really adds up,” Mark tweeted on Tuesday with a computerized picture of himself with some extra pounds!

The cast may soon be singing and dancing to Billy Joel‘s tunes again. The 61-year-old artist told Access Hollywood he’s already signed off on allowing the show to use his catalog!

Last season on Glee, Matthew Morrison and Neil Patrick Harris dueted to Billy‘s hit “Piano Man.”

15+ pictures inside of the Glee cast filming in Los Angeles…