Joe Alwyn is in L.A. while his ex, Taylor Swift, and her current boyfriend, Travis Kelce are in town ... and it seems there's a common connection in one Emma Stone.
The British actor surfaced Friday near a coffee shop in Studio City, where he appeared to be on his own and minding his business -- but by the same token, he wasn't really going incognito ... while JA was rocking a ball cap and shades, he removed both.