T?ime travel isn't possible, sadly ¨C so in the meantime, looking back on the famous faces we grew up watching, listening to and aspiring to be is as close as we can get.
From musicians, Hollywood stars and TV presenters to 'It girls' and heartthrobs, read on to see what the most memorable and nostalgic figures from your childhood and adolescence are up to now.?
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She was the original Girl on the Train.
'90s movie-goers couldn't help but fall in love with Julie Delpy the moment they locked eyes on her in 1995's Before Sunrise.
The French-American actress played Celeste, a student travelling home on a train when, by chance, she meets a charismatic American named Jesse, played by Ethan Hawke, and the pair decide on a whim to disembark together and spend 24 hours in Vienna.?
Hawke was already a gen X screen icon when the Richard Linklater-directed movie was released, and Delpy quickly reached the same status.?
Before Sunrise became an instant cult hit, and its sequels Before Sunset (2004) and Before Midnight (2013) only helped to cement Celeste and Jesse into the hearts of the millions of fans who've matured alongside them.
Delpy, pictured in 1992, had already carved out a name for herself in the film world before the Sunrise trilogy.
She was discovered by iconic French director? Jean-Luc Godard at age 14, landing a role in his 1985 movie D¨¦tective.
More roles followed, but it was 1990's ?Europa Europa that put her on the map globally. This was also the year Delpy moved to the US.
Other notable roles that came after Before Sunrise include An American Werewolf in Paris?, ER and Avengers: Age of Ultron.
Delpy, pictured in 2022, has also branched out into work behind the scenes in directing and writing, with several films to her name.
She also co-wrote Before Sunset with co-star Ethan Hawke and director Richard Linklater, earning an Oscar nomination for Best Adapted Screenplay? in the process. The trio then reunited to write the finale, Before Midnight.
As if these talents weren't enough, Delpy is also a musician, releasing a self-titled album in 2003 and writing songs for the soundtrack of two movies.?
If you were a tween or teenager in 2000?, chances are you were obsessed with Center Stage.
The movie follows a group of young ballet dancers as they join a prestigious training academy in New York ¨C facing hurdles, forging friendships and bashing the crap out of their ballet slippers as they pursue their on-stage dreams.
The movie's New York Ballet Academy might have been fictitious, but the dancing skills on screen were all too real.
Among the cast members was Ethan Stiefel, who played the academy's star dancer ¨C and love interest for our protagonist Jody Sawyer ¨C Cooper Nielson.?
Stiefel (left) had three years experience at the American Ballet Theatre under his belt before he was cast as the motorbike-riding bad boy in the film.
He went on to star in Center Stage's two sequels, and even starred as himself in an episode of Gossip Girl.
?However, his main professional focus has always been dancing.
Stiefel joined the New York City Ballet at age 16, and has gone on to perform with numerous companies.
In 2007, he made his debut with the Australian Ballet ?in Don Quixote, performing in Sydney and Melbourne.
Stiefel, pictured in 2016, commenced his role as director of the New Zealand Ballet in 2011.
He held the position until 2014, and has since become artistic director of the ?American Repertory Ballet.
Stiefel is married to a principal dancer with the American Ballet Company, Gillian Murphy.
The couple share a son.?
Toni Pearen has appeared on our screens ever since her debut as Toni Windsor on Aussie soap E Street at the young age of 17 in 1989.
Like many an actress before her, she left our familiar Aussie shores to make it big ¨C before being hit with a strong dose of reality.
Pearen was lauded for her talent with her E Street role, which she continued to play the role until 1992, after which she delved into another talent ¨C music. She produced two hit songs - 1992's In Your Room and 1993's I Want You ¨C which became ARIA certified gold singles. In 1994 she released her album Intimate, which peaked at number 56 on the ARIA charts.
In 1994, she made a return to the small screen with a stint on Home and Away as Beth Armstrong, and made her feature film debut in 1995's All Men Are Liars before packing it all up to move to the US. While there, she appeared in a few television shows, including a guest role on JAG, all while trying to earn more money on the side.
She described one such incident in an appearance on I'm a Celebrity Get Me Out of Here, which she starred in and came fourth in during it's 2021 season.?
She described one of her "slim times" in LA where she took inspiration from another actress friend to make a quick buck.
"She said to me, 'I went into this venue, and this guy just bought this entire basket of roses for $200. And that was my night.'
"I was like, 'Oh, my God, I want THAT job. That's amazing. I can do that.'
She described how she armed herself with a bunch of roses and went from venue to venue, but people simply turned their heads away from her attempts.
'It was humiliating. So, I went, 'You know what? I'm just going to go to a nightclub.' So, I go to this nightclub. No action for my roses."?
To add insult to injury, Pearen said that after she had given up and gone to a bar with her unwanted flowers, only to be recognised by a fellow Aussie - but only after he mistook her for Toni Collette.?
Embarrassed for being caught "slumming it", she laughed the man off.
She returned to Aussie shores in 2002, after which she landed the role of hosting Australia's Funniest Home Videos in February 2003. She thought the role was a perfect fit for her, commenting at the time that the show "reminds us that strange things happen every day, and you need to laugh." She continued this role until 2007.
She continued to make appearances on TV, appearing on shows such as Dancing With the Stars, and of course, I'm a Celebrity Get Me Out of Here.?
In the meantime, she also started a family with her husband Will Osmond, who she married in 2007. They welcomed two children - a son named Lucky in 2009, and a daughter named Ever in 2012.?
She has now come full circle, giving back by opening an acting school named The Talent Co, located on Sydney's Northern Beaches, along with her former fellow E Street actor Raelee Hill.
Frankie Muniz may have been the leading man of Malcolm in the Middle, but his on-screen brother Erik Per Sullivan well and truly held his own on camera.
His role as Dewey, the youngest of four brothers, made Sullivan one of the most recogniseable child stars of the 2000s.
The young actor had some small on-screen credits to his name, including Armageddon and Cider House Rules, when he landed the role in the family sitcom.
Malcolm in the Middle ran from 2000 to 2006.
In that time, Sullivan (pictured in 2007) picked up roles elsewhere, including in Joe Dirt and Finding Nemo as the voice of seahorse Sheldon.?
However, his acting career very quickly petered out, with his final role coming in 2010 ¨C four years after Malcolm ended.
Sullivan's final role was in 2010 movie Twelve, in which he played a minor character named Timmy.
Though it starred some big names, including Chace Crawford, Emma Roberts and Jeremy Allen White, the movie wasn't well received.
Sullivan basically disappeared from the spotlight in the aftermath of its release.
It's not really known why he walked away from acting, and he doesn't have a social media presence, so it's not entirely clear what he's up to these days.
It seems he pursued another path, reportedly studying at various US universities.?
S?ullivan also hasn't attended any Malcolm in the Middle cast reunions.
In 2012, Frankie Muniz (centre) shared this photo of a reunion with his co-stars from the show, with Justin Berfield, who played older brother Reese, holding a photo of Sullivan in his absence.?
In a 2022 interview, Muniz ?admitted that even he is in the dark about Sullivan's.
"To be honest, I don't know what he's up to. I hate to say that because I've talked to him a few times since the show ended," he said, per LADBible.
"But one thing I know, some actors or some people just got to do it when they were a kid and then they wanted to experience other things and kind of live a more normal life out of the spotlight.
"I think that's what he wanted to do, so good for him."
E?rin Moran was just seven when she made her big-screen debut ¨C opposite Hollywood heavyweights Debbie Reynolds and James Garner, no less.
But it was at age 13 that she was cast in the role she'd be forever remembered for, playing Joanie Cunningham in Happy Days.?
Moran had a sizable string of TV and film credits to her name when she joined the cast of the show in 1974.?
It would go on to define her years in the spotlight, with the world watching her grow up on screen.
After eight years on Happy Days, Moran and co-star Scott Baio, her on-screen love interest, pivoted to the spin-off series Joanie Loves Chachi.
Moran was reportedly hesitant to leave the main show's cast.?
"I didn't even want to do it. I was talked into it," she is quoted as saying.
"I wanted to stay on Happy Days."
T?hough the two characters had been popular on Happy Days, Joanie Loves Chachi was cancelled after just one year on air, with the two actors then returning to the original show for its final season in 1984.
In 2011, four decades after the show ended, Moran was one of four cast members who sued network CBS for $US10 million (approx $16 million) over royalties and merchandising revenue they claimed they were owed under their contracts.?
The case was settled in 2012, with the actors receiving much smaller payments than hoped for after a judge rejected their allegation of fraud.
After Happy Days, Moran went on to appear in ?shows including Murder, She Wrote, The Love Boat and The Bold and the Beautiful.
S?adly, Moran died in 2017 at the age of 56. An autopsy revealed her likely cause of death was complications of stage 4 cancer.
In the years leading to her death, it was reported she had fallen on hard times after Happy Days and Joanie Loves Chachi came to an end,? and had been living in a trailer park.
According to reports she had struggled with drug use.?
I?f there's anyone who knows how to lay down the law in style, it's Judy Sheindlin, aka Judge Judy.
?In the '90s, you couldn't turn on a TV without seeing her face ¨C usually reacting with exasperation to the wild confessions or justifications from her latest case.
If you've ever asked yourself the question, yes, Sheindlin is a legit lawyer.?
She earned her Juris Doctor degree at New York Law School, where she was the only woman in her graduating class.
She was hired as a corporate lawyer for a cosmetics firm, but quit after two years to raise her two young children from her first marriage.
In 1972, Sheindlin took a position in the New York court system as a prosecutor in the family courts. As a lawyer, she prosecuted child abuse cases, domestic violence and juvenile crime.
In 1982, New York mayor Ed Koch appointed her as a family court judge.