Christopher McDonald is refraining from leaking any plot details about the upcoming sequel to 1996’s ‘Happy Gilmore’

Christopher McDonald is happier than Happy Gilmore himself to be reunited with Adam Sandler onscreen. 

While speaking to PEOPLE at the Monday, May 19, New York premiere of Fountain of Youth, McDonald, 70, says he "was over the moon to be asked to be in" the upcoming Happy Gilmore 2.

However, McDonald said he could not reveal any plot details. “I signed an NDA. This is kind of a big deal," he says.

Almost 30 years after Happy Gilmore first delighted audiences, star and co-writer Sandler, 58, returns as the titular hockey-player-turned-golfer in the Kyle Newacheck-directed sequel, again co-written with Tim Herlihy. Returning cast members Julie Bowen, Ben Stiller, Dennis Dugan and McDonald are joined by a list of newcomers that includes Travis Kelce and Bad Bunny.

“I've been an ambassador for this movie for so long, 29 years later,” says McDonald, who in the original film and sequel plays Happy’s rival golfer Shooter McGavin. Of Sandler and distributor Netflix, he adds, “They've outdone themselves.” 

Happy Gilmore 2 is “about family and friends and love and basically a lot of heart, which I love about Adam Sandler's movies,” continues the Hacks star. “What I love about Adam Sandler is his heart. He's got so much love for people... And he's done some amazing work in the last few years. So I'm very happy for him.”

Of course, the long-awaited sequel also meant that McDonald — a real-life golfer — got to break out the clubs again. Were his golfing skills rusty or did he pick up right where he left off in 1996?

“Oh, that's part of the plot,” he teases to PEOPLE, again refusing to reveal any key details. “We shot it mostly in New Jersey, and just had a great time.”

Happy Gilmore 2 will be released on Netflix on July 25.