It’s difficult to imagine him with anyone other than his wife Tanya Haden, who he married 19 years ago and with whom he shares two children.
But fans of Jack Black have been shocked to discover that the Grammy-winning musician and prolific actor once dated a star comedian and actress before either of them were famous.
When they met, Jack’s Hollywood ex was an up-and-coming stand-up comic who was about to get her big break as a supporting character on NBC’s Suddenly Susan.
She then soared to prominence with a reality show called My Life On The D-List which followed the comedian’s life and earned two Emmy Awards.
The TV star, now 64, picked up a Grammy for Best Comedy Album in 2014 before making waves three years later by holding a mask of Donald Trump’s severed head, in a move which saw her investigated by the US Secret Service.
But can you guess who Jack’s suprising former lover is?

Fans of Jack Black (pictured, in October) have been shocked to discover that the Grammy-winning musician and prolific actor once dated a star comedian and actress

The School Of Rock star (pictured, in 2006) briefly went out with the stand-up comic before either of them were famous but can you guess who it is?

It is Kathy Griffin – who was an up-and-coming stand-up about to get her big break as a supporting character on NBC’s Suddenly Susan when she met Jack – she has rarely spoken publicly about her dalliance with Jack, now 55, he did feature in her memoir Official Book Club Selection, published in 2009 (pictured: the pair in the 1990s)
It is none other than Kathy Griffin, the record-breaking comedian known for her outspoken specials focussing on current affairs and famous figures.
Although she has only rarely spoken publicly about her dalliance with Jack, now 55, he did feature in her first memoir Official Book Club Selection, published in 2009.
‘Another example of me getting flack from the boys is when Jack Black dumped me. That’s right. I f***ed Jack Black,’ she wrote in the book.
‘Okay, we went out only two or three times, but that’s a relationship in my book. And by the way, this is my book,’ the A Hell Of A Story star joked.
She recalled that she ‘thought he was a weirdo, and was therefore instantly attracted to him,’ noting that ‘Jack and I were pretty much complete opposites.’
Kathy wrote: ‘I was always kind of a neatnik, a stickler for rules, and Jack would smoke pot and play video games all day.’
In her book, she dished: ‘When our brief fling ended, I got up at Un-Caberet and did a bit about how Jack dumped me for Andy Dick, because they had started hanging out and became their own mutual appreciation society about each other’s comedy.’
Kathy shared that ‘even though there wasn’t a single guy I knew that I hadn’t gone up onstage and talked about, Jack and Andy were staring daggers at me after that set’.

Last month, the comedian made a public remark on her short-lived fling with Jack, recalling an off-putting moment that took place in his bathroom while they were seeing each other

Her new TikTok came a month after she finalised for divorce from her second husband Randy Bick (pictured, in 2019), a year on from her initial filing
She recalled that she adopted a defiant attitude in response to their scorn, thinking: ‘I dont care. You broke up with me, Jack. And Andy, you’re probably high.’
Last month, the comedian made a rare public remark on her short-lived fling with Jack, recalling an off-putting moment that took place in his bathroom while they were seeing each other.
She told the anecdote in a new post on her TikTok, holding up a throwback photo of them cuddling up together on a sofa in the 1990s.
‘This is a picture of me and my then-boyfriend Jack Black, who you probably know mostly from School Of Rock,’ she told her fans.
‘So he was the first boyfriend I ever had where other bros thought I was cool because I was dating him – and by the way, dating is a very loose term,’ she quipped.
Setting the scene, she remembered that he used to live in an apartment on Vermont Avenue in Los Angeles – and then she told the story of a night she spent there.
‘So one night I spent the night there, and the next day I’m in the shower, and I remember saying to him – I get off on the bathmat and I said: “I need a shower towel.” And he goes: “You’re standing on it,”‘ said Kathy.
‘You guys, that’s straight guys,’ she deadpanned. ‘He had one bathmat/towel that he used for both, and that was it, so naturally I kept sleeping with him.’

It’s difficult to imagine Jack with anyone other than his wife Tanya Haden (pictured, in 2013), who he married 19 years ago

They married in March of the same year and share Thomas and Samuel (pictured, in 2019) together, born in 2006 and 2008
In January, Kathy divorced her second husband Randy Bick, a year on from her initial filing.
Kathy and Randy began dating in 2011 and tied the knot on New Year’s Day 2020, only for her to file for divorce in December 2023.
Shortly after it emerged that the marriage had fallen apart, a source spoke to DailyMail.com about the rift that had developed between them.
‘As of late, Randy was more content with being a homebody and instead of growing together, they started growing apart,’ the insider shared.
Kathy was previously married to Matt Moline from 2001 to 2006.
Jack went on to date actress Laura Kightlinger between 1996 and 2005 before becoming engaged to Tanya in January 2006, 15 years after they graduated from the same school in California.
They married in March of the same year and share Thomas and Samuel together, born in 2006 and 2008.