Drake got his old 'Degrassi' costars to reunite for his new music video on just about a week's notice ... so say two of his former cast/classmates.
Shane Kippel and Ephraim Ellis -- who played Drake's best friend and fateful shooter on the show, respectively -- tell us Drizzy's new treatment for "I'm Upset" was literally shot this past weekend, and that they'd only gotten a heads-up mere days before that.
That's pretty crazy, considering Drake dropped the video Wednesday night ... less than a week after filming. In fact, Ephraim says he got an email about the production last Tuesday.
Sounds like it's been a while since everyone from Degrassi Community School has had a chance to fully get together too ... especially when it comes to seeing their beloved Jimmy. Shane says he hasn't seen the dude in 5 years ... and it's been WAY longer for Ephraim.