Seth Rogen -- I Got Nothin' to Say About My Ill-Fated Flick

A stoic Seth Rogen arrived in L.A. Wednesday night ... and however he feels about Sony pulling the plug on his movie ... he's keeping it to himself.

Seth was impassive as photogs peppered him with questions. He didn't respond to a question about Rob Lowe's tweet Wednesday, suggesting he and Seth were comrades in arms over their distaste for Sony's decision.

As Rogen and his pooch made their way to the awaiting limo, a guy who looks like security was by his side.

As for Lowe, he went to Craig's in West Hollywood last night ... a sure fire way for any celeb to get on camera. But for some reason he's more into tweeting than talking.