Wahlberg provided an update on the long-rumoured project by telling CNN that Entourage creator Doug Ellin is committed to moving forward with the film.
"Doug Ellin is actually right now writing the script as we speak," he said. "He's finally started writing and hopefully it won't take too long now."
Wahlberg also hinted that the movie could be released as early as the summer of 2013.
Entourage star Rex Lee previously commented that the movie was more likely to be produced now that Ellin's pilot 40 has been scrapped by HBO.
The series wrapped its run after eight seasons and four Emmy Awards on HBO in September 2011.
Watch a trailer for the final season of Entourage below: