John Stamos slams Lori Loughlin’s ex as a 'narcissist' who 'busted her up to the core'

John Stamos is team Lori Loughlin to the end.

The former “Full House” star spoke about his co-star’s split from her soon-to-be ex-husband, Mossimo Giannulli, during his appearance on the “Good Guys” podcast.

“I'm just heartbroken for her right now,” he said of Loughlin’s and Giannulli’s recent separation. “She’s just devastated. For a girl who has lived her life really well, a good person, a good mother, a good wife — I know all this for a fact — to be thrown into now this separation and, you know, exploding, blowing up her family this way, I just hate to see her go through this. I really do.”

Stamos said he’s tried to be there for Loughlin not only through this break up, but the college admissions scandal, when she and Giannulli pled guilty to faking their daughters, Oliva Jade and Isabella, as crew recruits for the University of Southern California.

In his opinion, Loughlin’s troubles have been tied to Giannulli.

“I said, ‘Look, all the negativity or hard hardships that you've been through in your life is connected to this guy,’” the actor said. “Whatever he did to her, it busted her up to the core. She put up with a lot over the years of this guy. And again, I'm not going to get into the relationship. It's not my business. I mean, I know a lot, and I was by her side through a lot of it. She is an angel, and she always made things better. She cleaned everything up. He's a very successful dude.”

The 62-year-old added he “will never talk to” Giannulli again, calling him “a terrible narcissist.”

“I pray for this guy,” Stamos continued. “I pray that he gets a hold of whatever hole that he's trying to fill, however he's trying to fill it. I pray that he realizes that what he had was everything that anyone could ever hope for and that he gets some help. I think this guy needs help.”