08/10/2011 AT 06:00 AM EDT
After premiering Glee: The 3D Concert Movie
in L.A., Cory Monteith
hit up Napa Valley Grille for a solo dinner. The actor ordered a Caesar salad and pork chop, and washed his meal down with a diet soda. According to an onlooker, he was in a good mood and happily posed with fans at the restaurant.