Ashton Kutcher -- Winning Over "Two & a Half Men" Crew

The tide is turning at "Two and a Half Men" after Ashton Kutcher's mega-trailer pissed off several crew members -- in fact, we're told, Ashton is quickly becoming extremely popular on set.

Filming kicked off this week -- and a source close to production tells TMZ, "Everything so far is smooth. A little too soon to tell, but Ashton seems very likable and professional. We're all very happy to be working with him."

As we previously reported, Ashton rolled into Warner Bros. studios recently with a MASSIVE trailer -- and some die-hard Charlie Sheen supporters on set thought it was way "over the top."