Jeremy Piven says Mark Wahlberg is the important thing to “Entourage” making a comeback.

We bought the OG star of the hit HBO collection Monday at The Butcher, The Baker, The Cappuccino Maker and requested him what Mark may do for a possible reboot.

Mark lately went on the document in assist of an “Entourage” comeback, however he hasn’t dedicated to starring in a possible collection … and Jeremy tells us Mark is the important thing to getting the concept off the bottom.

The best way Jeremy sees it … all Mark must do for “Entourage” to return is to carve out time from his notoriously busy schedule and get on the telephone with HBO.

Mark was a co-executive producer on the OG present and Jeremy says it is only a matter of Mark stepping as much as the plate and giving followers what they’re clamoring for.

Whereas Jeremy would not know if Mark will ever signal on to get in entrance of the digicam for a recurring function on “Entourage” … he tells us what he thinks may deliver Mark into the fold this time round.