Perry made the kind gesture when she got her first acting check from the CW show but had bad credit, she told Fox News.
"I had just got my car because I got a paycheck, and I had bad credit and he heard me talking to the dealership – and he offered to co-sign for my car. And, I had known him a few months – and I will never forget that, ever,” Law said.
Perry, who played Archie's father Fred Andrews on "Riverdale," died at age 52 after suffering a massive stroke at his California home.
Perry was remembered as a childhood staple and overall kind-hearted person.
“...I think I’m still in shock. I just woke up and my phone was going nuts and I still don’t believe it. It’s awful, awful, awful. He’s just so positive and amazing to work with," Law told us of the late actor.
Law portrays Riverdale High School student and Josie and the Pussycats bandmember Valerie Brown in the CW series.