RJ Mitte's sister doesn't know if her "heart can even be whole again" following her sibling's tragic death.

The Breaking Bad star - who was diagnosed with cerebral palsy at the age of three and went on to play Bryan Cranston's onscreen son Walter, Jr. in the hit drama - died earlier in October after taking his own life at the age of 34.

His nearest and dearest have been remembering him in heartfelt posts since then, with sister Lacianne Carriere the latest to share her memories.

Posting several throwback pictures of her late sibling on Instagram on Friday (23.10.26), Lacianne wrote: "There are just no words. You were just here … your strawberry Fanta was still sitting on my coffee table when I got the call.

"Life hasn't felt real since then."

Lacianne called RJ her "everything" as she continued: "I just lost my other half. I lost my brother but I also lost my father. Every single aspect of my personality is because of your influence.

"My music taste, my film taste, the video games I love … because of you, I am a collector, you taught me that even the smallest piece of paper can be a precious memory later on."

She continued to reveal that she and RJ's "closest people" have been "sitting around almost every night" recalling the "craziest stories that could never be said anywhere else and god that was just you".

She wrote: "You were the life of the party, [the] coolest guy that we all tried to keep up with but never could. You made me, me. "We had so much more to do, so many more memories to be shared and I don't know if my heart can ever be whole again after losing the biggest piece of it."

Lacianne concluded her post by saying that while she's finding it difficult to come to terms with her brother's death, she's going to do her best to keep him living through her.

She wrote: "I just really need my brother right now. You would put on some lofi music and tell me to get up and go sit in the shower, how it always makes you feel better.

"I know you're telling me right now that I'll be okay though I don't know how I will, but I promise I'm going to do my hardest. I promise your love will always live through me until the day I see you again.

"I loved you completely, and you loved me the same. That's all. The rest is confetti."