Lauren began dating Jason in high school and fans followed their relationship throughout the MTV shows Laguna Beach: The Real OC and The Hills.
However, their romance was far from plain sailing and twice they came to a bitter end. The first time around, Lauren caught Jason kissing his ex Jessica behind her back and the second time, fans saw them split after they'd spent a summer arguing at their Malibu beach house.
Who can forget, Lauren's decision to move there meant she was "always known as the girl who didn't go to Paris".
What MTV viewers didn't realise at the time though, was that Jason had been battling an addiction to alcohol and drugs, meaning their relationship had been under additional strain.
Now clean and sober, Jason has spoken out about his former girlfriend and admitted that they are no longer in contact with one another.
In an interview with Us Weekly, Jason said: "I don't really talk to Lauren at all anymore, the last time we talked was probably six months ago or something.
"She's a sweet girl, and we are just totally different personalities and she is super, super sweet. She's very kind and good at what she does.
"We're just two completely different personalities – [and] me being full fledged in my addiction during that time, that did not help."
Last month, Lauren married her lawyer fiancé William Tell in a romantic ceremony held in California.
Jason, meanwhile, is also happily married to wife Ashley Slack, who he tied the knot with in October 2013.
Aside from not speaking to Lauren anymore, Jason did reveal that he has been spending a lot of time with many of his former Laguna Beach stars after getting back in touch with them.
"A lot of us are actually talking more now than we did in the past," he added.
Laguna Beach: Where are they now?