The wrestling world is mourning after the sudden passing of Jim 'The Anvil' Neidhart.The Canadian two-time WWE tag-team champion died on Monday morning aged 63.Neidhart is, of course, the father of current WWE superstar Natalya and was perhaps most famously known for being one-fifth of the Hart Foundation.Sadly, only Bret Hart now survives from that legendary stable with Owen Hart, Brian Pillman, Davey Boy Smith all dying far too young.Neidhart won the tag titles with Bret Hart as his partner on both occasions and he was a respected and beloved legend in the wrestling business.Neidhart's brother in-law, Ross Hart, revealed that Neidhart's death was due to a grand mal seizure related to Alzheimer’s. Early 2000s WWE star Christopher Nowinski had noted on Instagram last month that Neidhart was battling the disease when he met with Natalya:“Always great to catch up with the living legend @natbynature when she is in Boston for RAW. Heck of a match, heck of a show. She is so courageous to share her family’s life with her father’s Alzheimer’s disease.”Nowinski later edited the post and removed the reference to Neidhart battling the disease.Neidhart's passing has hit the wrestling world hard and the tributes have begun pouring in on Twitter. Here are the best ones:

Natalya currently finds herself as one of the central pieces in the Ronda Rousey/Alexa Bliss storyline heading into SummerSlam this Sunday, but she isn't scheduled for a match of her own.

While she may have been booked to stand ringside with Rousey while the former UFC champion tries to prize away the Raw Women's championship, only time will tell if that is possible.

It's clear to see how loved Neidhart was and the support for Natalya has been beautiful to see. It's unknown whether she will be on Raw tonight or not, but one can expect a great video package and a standing ovation for The Anvil regardless.

RIP to Jim 'The Anvil' Neidhart.

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