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Rob Lowe is spending the day on set of his show 9-1-1: Lone Star!

The 57-year-old Emmy-nominated actor was all smiles as he chatted with crew members in between scenes of his Fox TV show on Wednesday afternoon (January 19) in San Pedro, Calif.

PHOTOS: Check out the latest pics of Rob Lowe

Rob was seen suiting up in his firefighter gear as he talked with some of his cast members before they began filming a scene.

In an interview from a few months ago, Rob looked back at filming sex scenes in the ’80s, and explained why he found them “very boring.”

New episodes of 9-1-1: Lone Star premiere on Monday nights at 8/7c on Fox. Click through the gallery for 45+ pictures of Rob Lowe filming ’9-1-1: Lone Star’ in San Pedro…