The 26-year-old star shot some scenes alongside co-star Jesse L. Martin.
That same day, Grant posted an adorable Instagram photo with his dog hanging outside his trailer.
“Jett’s looking good with his summer cut and I’m easily distracted while taking us-ies of me and the dogs. Gotta use that first take though,” he captioned the pic, which you can see below.
15+ pics inside of Grant Gustin filming The Flash with Jesse L. Martin…