Luke Perry sadly passed away in March at the age of 52.

One person who is still finding it extremely hard to come to terms with the tragic news is Luke's 90210 castmate Brian Austin Green.

The 45-year-old, who played David Silver on the hit TV series, recently opened up about his grief during an episode of his podcast, ...with Brian Austin Green.

Luke Perry and Brian Austin Green [[imagecaption|| Credit: Getty]]

On the show, Brian revealed he had texted Luke after he found out he had passed away for a rather moving reason.

"I texted him after he passed, knowing obviously that he can’t text me back but on some level, hoping that he would text me back, or that he was out there somewhere," he explained. "And I know he is. I know he’s looking down and I know he’s smiling."

According to the American actor, a group of former Beverly Hills castmates met up at Gabrielle Carteris' home following Luke's death, gathering to celebrate his life.

Claiming he hadn't seen some of the people who came in at least 18 years, Brian revealed: "It was very mixed emotions because you were happy to see everybody … but what a horrible reason to have to see everybody again."

An image of Luke Perry. [[imagecaption|| Credit: Getty]]

Later in the podcast, the Terminator: The Sarah Connor Chronicles actor spoke further about his friend, claiming Luke was "a rock".

"Luke was a special guy. I’m still mourning over it, so there’s a part of me that’s kind of shocked that I’m speaking about Luke this way," he said. "We all knew that at some point we’d have to deal with losing cast members and friends, but not this soon. Not at 52. Not in such an abrupt way."

He added: "Luke was one of those people nobody had a bad story about. He was just a great guy. And he was Luke no matter where you saw him, no matter when you saw him, no matter what he was going through. He was a rock."

Following the 52-year-old's untimely death, there has been a big question in the air: how will his passing be dealt with on Riverdale? According to the CW show’s executive producer Roberto Aguirre-Sacasa, execs are still attempting to figure out the best way to handle his unexpected passing.

Riverdale cast [[imagecaption|| Credit: Getty]]

Speaking to Entertainment Tonight, he said: "You know, honestly we are I think all still in shock and are still processing and grieving. We know that we have to address it in some way, but we’re giving ourselves a little bit of time and space before we figure out the best way to honour him.

"Luke was, is, and will always be a big part of Riverdale. We’re kind of a family and when a loss like this happens, you carry it always. It changes and it hopefully becomes a little less painful as time goes by, but you've changed. When I was with the crew, I said, 'it will never be the same', and that’s true because Luke was such a part of the show."

Roberto confirmed there are still a few episodes of Riverdale yet to air with Luke's character, Fred Andrews. No doubt Luke's fans will be keen to tune in to say a final goodbye.

Brian Austin Green reveals why he texted Luke Perry after he died