Michael Phelps' winning streak continues. Sources are telling PerezHilton.com that the Olympic champ will be a guest star on the upcoming season of "Entourage!"
A snitch on set whispers that Phelps is shooting right now in NYC -- and he'll appear in the season finale of the show.
If Phelps fans can't wait 'til the finale, they'll catch a glimpse of him soon enough. The record-breaking swimmer will dive into the MTV Video Music Awards as a presenter on Sept. 7 -- and as a guest host on "SNL" on Sept. 13.
Click on an image to view the MICHAEL PHELPS photo gallery!