Greg Plitt, an actor and renowned fitness instructor, was struck and killed by a Metrolink train on Saturday in Burbank.

He was 37.

Plitt recently starred in the Bravo show “Work Out.” He also appeared in the network’s upcoming reality series “Friends to Lovers,” which premieres Monday.

According to the Los Angeles County Sheriff’s Transit Services Bureau, Plitt was struck just after 4:00 p.m. on Front Street, north of the Metrolink station.

The former Calvin Klein model was with some friends who may have been taking video at the time, according to KABC.

“He had on all black. The train went by. I saw him stumble over the tracks. He had a camcorder in his hand,” a Metrolink passenger told the local TV station.

The incident is currently under investigation.

Plitt also appeared in the 2013 boxing drama “Grudge Match” opposite Sylvester Stallone and Robert De Niro.