Black Sabbath's Back to the Beginning farewell gig rocked out Birmingham on Saturday
Frontman Ozzy Osbourne took to the stage on throne to perform five songs
Then the band played their final ever show with the frontman saying "thank you from the bottom of our hearts"
"Without Sabbath there would be no Metallica" - James Hetfield told the crowd earlier in the day
Steven Tyler, of Aerosmith and the Rolling Stones' Ronnie Wood were among the guests at Villa Park
David Lumb
BBC Midlands Today
The money from today's show is going to three charities - including Cure Parkinsons.
Their chief executive, Helen Matthews, says the day has been "absolutely fantastic".
She adds: "The atmosphere is electric. Everyone has been so generous. What a brilliant way to raise the profile of all three charities.”
Ian Youngs
Culture reporter
Image source, Getty ImagesSammy Hagar and Ozzy Osbourne pictured together in 2014
Anybody who's anybody in heavy metal and hard rock is here today to pay homage to Black Sabbath and Ozzy Osbourne.
"Black Sabbath really kind of started all this, the metal era," former Van Halen frontman Sammy Hagar tells me backstage.
"Everyone looks at them like the kings, and if the kings are going to go out then we're going to go honour them.
"Everyone that was asked to do this, shoot, you drop everything and do this. This is going to go down in history as the greatest metal event of all time.
"And for Ozzy and Black Sabbath to be saying, we're finished... There are [other] big bands, don't get me wrong, but Ozzy was a special character, and is still a special character. And it makes it a little different when he says, 'I'm quitting'."
How is Ozzy? "I haven't heard him sing. We took pictures together and all that, and he's the sweetest man in the world," Hagar adds, before getting a bit emotional.
It's clear Ozzy and this day mean a lot.
David Lumb
BBC Midlands Today, Villa Park
Mike and Chris are from Bristol
I've met so many different people in the queue - lots are here with family members.
Brothers Mike and Chris, both 29, have come from Bristol.
"We are pretty damn excited," they said.
"We can't believe it’s real to be honest.
"We're trying to keep our energy up, it’s going to be a long day."
Despite living on different continents, Dusan and Reuben Kovalsky are here together
Father and son Dusan Kovalsky and Ruben Kovalsky are from the Czech Republic and Los Angeles.
"We started queuing last night at 8pm," Ruben said.
"We reckon we were about 7th in line, we had no sleep at all but it will be worth every minute.
"It needs to be done, it means so much. The man is the architect of my favourite music."
Ben Sidwell
BBC Midlands Today
The first of two supergroups are on stage now.
Members of Extreme, Megadeth and Sleep Token among others.
They’ve just been joined by Yungblud for an incredible version of Ozzy’s hit "Changes".
PJ Ellis has now started his live broadcast for BBC Radio WM from the Black Sabbath bridge in Birmingham's Brindley Place.
He will be on the radio until 19:00 BST - on 95.6FM, DAB and BBC Sounds.
Ben Sidwell
BBC Midlands Today
Next up Lamb Of God from Richmond, Virginia. I love that bassist John Campbell looks like he is just loving being here today!
The bands are all throwing things to the crowd at the end of their sets.
Drum sticks, guitar plectrums but Lamb Of God lead singer Randy Blythe is so excited to be here, he has just taken off his shoes and thrown them to the crowd.
He’ll regret that when he sees the price of a new pair down the Bullring!
Lamb Of God have taken to the stage
Ben Sidwell
BBC Midlands Today
As you can imagine, not everyone has been able to get a ticket for this gig which, along with the Oasis reunion tour, appears to have been the biggest draw this year for music fans.
So in between the bands, as they changeover on stage, they have been playing messages from some huge rock and metal stars who could not be here for the gig - expressing their love for Ozzy and Sabbath.
Andrew Marston
BBC Hereford and Worcester
The gates at the former home of Sabbath drummer, Bill Ward
Did you know Black Sabbath drummer Bill Ward used to live at Ridgeway Cross, near Cradley, Herefordshire?
His old house was bought by John Townsend around 1980. The gates have music notes on them, which if played, you would hear the opening bars of Sabbath's biggest hit Paranoid.
Mr Townsend told the BBC he only met the band once in the local pub, and they were "worse for wear".
He said the house however, had "fantastic furniture".
"My sister and I, we were looking around trying to buy them off them," he said.
"Outside was like a huge thing.. fibreglass, that was all painted up in weird things… skeletons, people with no heads."
Mr Townsend added there must have been good parties because there were "drink stains on the ceilings", as well as the furniture.
The BBC isn't allowed to film inside Villa Park today, by the way. There is coverage around the show on BBC Radio WM on 95.6FM, DAB digital radio and BBC Sounds.
Anthrax have taken to the stage
The “Big 4" in metal refers to the four most influential American thrash metal bands: Metallica, Slayer, Megadeth, and Anthrax.
Three are playing today at Villa Park.
Anthrax have just come out to a huge noise!
David Lumb
BBC Midlands Today at Villa Park
Steve got here from Georgia on 25 June
Steve has flown across the pond to make it today - travelling without a ticket!
He's from Georgia in the US, and got here on the 25 June.
He told me he'd managed to get a ticket for £150 at the ground at 7:30am.
"I'm feeling pretty pumped. It’s going to be smashing," he said.
Sarah Julian
BBC Radio WM, Aston
Fans are watching the gig on a big screen at many venues around the city, including this one at the Witton Arms, which is just metres away from Villa Park.
They have been open since 10:00 BST and will stay open until 01:00 BST, hosting street food stations and live music.
The venue has space for about 1,500 people.
About 300 people waited outside the Witton Arms this morning
Kiran Chavda is its landlord, and tole me he'd "never seen anything like it."
There was a queue of about 300 people outside the doors at 10am, who let out a cheer when they opened the doors.
He said everyone was in great spirits.
Ben Sidwell
BBC Midlands Today
The highly-anticipated gig has begun!
First on stage is Mastodon, a heavy metal band from Atlanta.
Metal acts are taking to the stage
Chloe Hughes
BBC News
The answer to that question is: very.
It is Ozzy Osbourne's final-ever performance, and 20 years since the original Black Sabbath have played together.
The original band is reuniting one more time - 20 years after they last played a full show together
Earlier this year, Sharon Osbourne told the BBC that Birmingham was the "home of metal" - after all, it was where the band was formed in 1968.
Ozzy Osbourne, Tony Iommi, Geezer Butler and Bill Ward all grew up within a few streets of each other, a stone's throw from the Aston stadium.
The band's relevance to the city's cultural heritage was recognised when they were awarded the Freedom of Birmingham last weekend.
It's also for a good cause - all profits are being split equally between Cure Parkinson's, Birmingham Children's Hospital and Acorn Children's Hospice.
Cure Parkinson's is a cause close to home for Osbourne as he has largely been forced to stop touring due to the disease and spinal injuries.
Ben Sidwell
BBC Midlands Today, Villa Park
Hundreds of fans are queueing in the hope of grabbing merchandise while they're here.
The queues are really long, winding way down the street in both directions.
The queues for the merch stalls near Villa Park stretch down the road
Of course, it's not just normal merch - it's been specifically designed for the occasion.
Some pieces feature Black Sabbath, some items just have Ozzy on them.
There's even limited edition numbered items - so these really are exclusive.
Some items are limited edition and numbered
Chloe Hughes
BBC News
Didn't get tickets but want to get involved?
There is loads going on across Birmingham that celebrates the band and the gig.
The Flapper, an independent music venue in Cambrian Wharf, is hosting a Black Sabbath weekend, external, where they are playing the livestream of the concert, as well as hosting a tattoo takeover, alt traders and DJs.
The best part? It's free entry. Plus, if you don't make it today, they're replaying the livestream tomorrow too.
Image source, John BrayThere are events happening as well as free sites dedicated to the band
Tilt, a craft beer and coffee shop in City Arcade, in the city centre, is also hosting a Black Sabbath weekend.
They're inviting people to go along, drink some beer and celebrate the occasion. They've got pinball machines and will be playing plenty of metal music.
Open until midnight, the energy will be high at Tilt all day.
Image source, Getty ImagesThe Black Sabbath bench is an iconic landmark for fans of the band
There are also dozens of shrines to Ozzy and the band around the city.
From Ozzy the mechanical bull, in New Street Station, to the Sabbath Bench and the murals on Navigation Street, there's plenty to see.
We've compiled a list of them all here.
"They started the year my mum was born, in '68," says 21-year-old Byron Howard-Maarij, who has been visiting Working Class Hero - an exhibition dedicated to Ozzy Osbourne.
"I'm a massive metal fan, so the fact that the originators are coming back to where it all started, it's really exciting."
Read more about Ozzy, Black Sabbath and their early years here.
Vanessa Pearce
BBC News, West Midlands
Ozzy Osbourne, Tony Iommi, Geezer Butler and Bill Ward all grew up within a few streets of each other, a stone's throw from the Villa Park stadium in Aston.
The band was initially called Earth, and emerged from a "vibrant music scene" in 1960s Birmingham, according to their first manager Jim Simpson.
The four started out playing blues, before turning their attention to writing their own material.
Image source, Getty ImagesGeezer Butler, Tony Iommi, Bill Ward, Ozzy Osbourne formed Earth, later renamed Black Sabbath, in 1968
The band initially made a "horrendous racket," says guitarist Iommi, "But, it worked out in the end, it was great."
The band's distinctive sound, which helped propel them to worldwide success, was partially down to Iommi's earlier job at a steel factory.
Planning to leave work in order to take up a place with another band, he had lost the tips of two fingers on a steel-cutting machine.
"When Tony had his accident, and had to detune some of the strings, things started to get lower and heavier, and that's when the magic really started," said Rob Halford, lead singer of fellow Midlands metallers Judas Priest, who grew up a few miles away in Walsall.
David Lumb
BBC Midlands Today, Villa Park
Black Sabbath fans from across the world arrive at Villa Park
We've been speaking to fans who were lined up outside Villa Park, and it's clear this means a lot to them.
They have travelled far and wide, desperate to see Sabbath and Ozzy especially.
It's the first time the original band's line-up has performed together for 20 years, and the last ever performance for Ozzy, who suffers from Parkinson's.
The show is an event that is sure to go down in history.
David Lumb
BBC Midlands Today, Villa Park
Fans are now being let in to the stadium
And the doors are open!
Thousands of fans are now heading inside Villa Park for a whole day of metal, and to witness history.
A few who were particularly eager had to be pulled back to be searched, but it's all fairly civilised here.