John Stamos Slams Lori Loughlin's Ex Amid Split

John Stamos is sticking by his friend and former Full House costar Lori Loughlin after her split from husband Mossimo Giannulli. When discussing Loughlin’s ex during an Oct. 20 appearance on the Good Guys podcast, Stamos, 62, didn’t hold back. “Whatever he did to her, it busted her up to the core,” he said. “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. [Mossimo’s] a terrible narcissist.… I will never talk to him again.”

- ALEX ROSS,PERNILLA CEDENHEIM,GILLIAN TELLING

"It's unlikely that they'll find their way back together," a source says of the couple (in 2012).

A source close to the exes tells