By EW Staff
Updated June 12, 2006 at 12:00 PM EDT

Thanks to you sharp-eyed Entourage watchers for raising this question, which was also kind of nagging me: How are Vincent Chase (Adrien Grenier) and Johnny Drama (Kevin Dillon) related? Of course, the short answer is that they’re brothers. But didn’t we learn at some point that they were half-brothers? I mean, after perusing HBO’s official site, I haven’t come up with any evidence of that. And they do have the same last name, which would imply that they had different mothers, if anything. But Drama was awfully familiar (and familial) with guest star Mercedes Ruehl (pictured, with Grenier), who played nervous flier Mrs. Chase. (I also thought Vince had changed his name when he went into acting, but wasn’t Drama an actor first? And, in that case, why would their mother’s surname be Chase? Last night’s season premiere was only 23 minutes long, but it certainly raised enough questions.

I suppose I could call HBO, but what fun would that be? Do you guys have any answers?