'Full House' Fans Are Fully Sobbing After John Stamos' IG Post

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links."

• John Stamos'memoir is set to debut on October 24.

• And it clearly already has him reminiscing about his time on Full House.

• The actor's upcoming book, titled If You Would Have Told Me, will cover all of the most important milestones in his career.

John Stamos'memoir isn't set to debut until October 24, but it clearly already has him reminiscing about his time on Full House.

The actor's upcoming book, titled If You Would Have Told Me, will cover all of the most important milestones in his career — and he appears to be kicking off his walk down Memory Lane with a video uploaded to his Instagram account on August 10.

The emotional montage shows John and the Full House cast (including the late Bob Saget, Lori Loughlin, Jodie Sweetin and Mary-Kate and Ashley Olsen) in some rare behind-the-scenes moments from the popular sitcom. In the voiceover to the clip, John got sentimental about how much Full House still means to him, almost four decades later.

"The essence of a family isn’t defined by its shape, size or color," he captioned the sweet snippet. "Family is where you find belonging and connection, and just know, you’ll always be part of ours."

John has a loyal fanbase, thanks in large part to his portrayal of Full House's Jesse Katsopolis, so it isn't surprising that folks immediately became overwhelmed with emotion after watching the throwback clip.

"I wasn’t ready to break down into full tears today but here we are," one person wrote on Instagram. "I just cried like I've never cried before," another added. "I felt like I was watching a family home movie. 🥲❤️ This is beautiful. Loved this show and family," a different follower noted.

While Full House fans clearly can't get enough of the show, the Grandfathered alum had to work on developing a similar sentiment throughout the years. In the video's voiceover, John explains his feelings about the series in what seems to be an excerpt from his upcoming book:

Jessica Alba

If you've forgotten about the '90s gem that was The Secret World of Alex Mack, allow me to remind you it existed... you're welcome. Jessica Alba actually made her TV debut as one of the original characters. She played a character named Jessica, the girlfriend of Alex's crush Scott Greene, who was snobby, rude, and always mean to Alex. She appeared in the pilot and two other episodes before moving on.

Leighton Meester

It's still hard to picture Leighton Meester as anyone besides Blair Waldorf, but years before she snagged that role on Gossip Girl, Leighton appeared in a decidedly different show: 7th Heaven. Leighton played a tutor named Kendall with mean-girl vibes in the two-part finale of the show's eighth season.

Adam Scott

Nope, that isn't a picture of Adam Scott in 2020—it's a picture of him in 1995 when he appeared in a few Boy Meets World episodes (great genes, Paul Rudd-level genes). Adam played Griffin Hawkins, a band member and so-called tough guy at John Adams High.

Gabrielle Union

Gabrielle Union is known for her *perfect* performances in huge early-aughts movies like Bring It On and 10 Things I Hate About You, but before all of that, she was on 7th Heaven for a bit. Gabrielle played Mary's friend Keesha Hamilton in season one, and she was in five episodes.

Milo Ventimiglia

This just might be the most random thing you read today: before nabbing the Gilmore Girls role that made him a famous heartthrob, Milo Ventimiglia had a very small role in The Fresh Prince Of Bel-Air. He played a party guest and had a few short lines.

Mila Kunis

Mila Kunis was yet another star who had one of their first big-deal acting roles on 7th Heaven. For two episodes, she played Ashley, the bad girl who somehow became friends with Lucy and started some serious drama in the family.

You can also find Mila in Baywatch, another hit '90s show. She appeared in two different episodes playing two different characters. First she was a young student named Annie, and a year later, she played Bonnie, who got lost while hiking.

Alex Borstein

Pre-The Marvelous Mrs. Maisel, you might remember Alex Borstein from Gilmore Girls, but before that, she made an appearance on Friends. She appeared in one episode, where she plays a one-woman show for Joey's soap opera party.

Lucy Liu

In a blink and you'll miss it role, Lucy Liu showed up in Beverly Hills, 90210 as a waitress named Courtney. Courtney was a straight-A student who took Brad's place when he quit.

Craig Robinson

Ignore The Office vibes: this is a screenshot of Craig Robinson's appearance on Friends. Craig had a very small role as a store clerk talking to Phoebe during the final season of the show.

Keri Russell

Keri Russell got her big break playing Felicity in Felicity (that hair!), but before that, she appeared on Boy Meets World. Russell played Mr. Feeney's niece, who ends up having a tiny fling with Eric. And, yes, her hair looks fantastic.

Michelle Williams

Michelle Williams got her start on '90s favorite Dawson's Creek, and is now a bonafide A-lister, but before all of that, she showed up on two of your favorite '90s shows. One was Home Improvement, where she played Brad's girlfriend Jessica. The other was Baywatch (which was actually her first TV role), where she played a popular girl who went to school with Hobie.

Ryan Gosling

Way back in the day, Ryan Gosling was dancing and singing along with Britney Spears and Justin Timberlake on The Mickey Mouse Club. In the '90s, he also appeared on Are You Afraid of The Dark? as Jamie Leary, whose brother is obsessed with death.

Gosling also showed up in Goosebumps, just to keep the spooky theme going, where he played Greg in an episode about a group of friends who find a camera that kills the person who is having their photo taken. Dark.

Neil Patrick Harris

Keep an eye out for Neil Patrick Harris in the iconic '90s show Blossom. Although NPH was getting pretty big at the time, since he was playing Dr. Doogie Howser, this is still worth pointing out. He appeared in one episode as the über charming Derek Slade. That same episode included appearances by Dick Clarke and Tori Spelling.

Vivica A. Fox

You can catch Vivica A. Fox on season one of The Fresh Prince of Bel-Air, when she played Jazz's bossy and controlling sister Janet. She initially gets set up with Will, but when he doesn't like her personality, he tries setting her up with Carlton. His loss, TBH.

Matthew McConaughey

Matthew McConaughey is now a BFD award-winning actor, but his debut role was small: he was in an episode of the original Unsolved Mysteries. He played Larry, an ex-marine and young father who becomes something of a hero... with a really tragic ending. We won't spoil it for you.

Bradley Cooper

Bradley Cooper's very first credited role was on Sex and The City, where he played a character he's played many times since: a total jerk. He plays Jake, a guy Carrie meets during a night out, who ultimately makes her feel really bad about herself. Not surprisingly, he didn't return.

Ellen Pompeo

Everyone knows Ellen Pompeo as Meredith Grey on Grey's Anatomy (even those who don't watch the show), but before that, she was in one episode of Friends. She played Ross and Chandler's college crush Missy Goldberg in the final season.

Hilary Swank

You can actually catch Hilary Swank in a few different '90s TV shows, like Growing Pains and Evening Shade. She got a bigger break when she nabbed a regular role on Beverly Hills 90210, where she played Zach's mom Carly Reynolds. Hilary lasted for 13 episodes before getting fired. Only a few months later, she was in Boys Don't Cry, which got her two Academy Awards, so.... she ended up winning.

Cole Sprouse

Cole Sprouse didn't get his start on The Disney Channel like you may have thought. He actually played Ross's son Ben in Friends, where he showed up in a few episodes to be extremely adorable.

Don Cheadle

Before his acting career took off, Don Cheadle appeared in season one of The Fresh Prince of Bel-Air, where he played Will's friend from home, Ice Tray. Actually, there was almost an entire spin-off of the show starring Don's character, but unfortunately, it never got picked up.

Kat Dennings

Sex and The City stans will remember Kat Dennings in her first TV role: Jenny Brier, a spoiled 13-year-old who hired Samantha to plan her bat mitzvah. And look at Kat now! She's a full-fledged star.

Leonardo DiCaprio

Since he's such a maaaajor movie star now, it's almost easy to forget that Leonardo DiCaprio was on a bunch of old TV shows back in the day. One worth pointing out was his time on Growing Pains. Leo came in at the final season of the show as Luke Bower, a homeless teen who was taken in by the Seaver family.

Marla Sokoloff

Queen of le '90s Marla Sokoloff played Gia in several episodes of Full House. Gia was Stephanie's mean-girl/cool-girl friend who managed to push everyone's buttons. It was one of Marla's first notable roles, although she also appeared in shows like Boy Meets World, Step By Step, Home Improvement, and 3rd Rock From The Sun.

James Marsden

One of James Marsden's first roles was on The Nanny, where he appeared in a few episodes. He played Eddie, Margaret Sheffield's boyfriend. After his appearance on The Nanny, James went on to show up in shows like Saved By The Bell: The New Class and Party of Five.

Mena Suvari

Before snagging her role in American Beauty, Mena Suvari appeared in Boy Meets World. She was actually in two different episodes as two different people. The range, ppl! First she played Laura in one episode and then Hillary, a girl at a party that Cory goes to without Topanga. *dun dun dunnn*

Anne Hathaway

Anne Hathaway didn't just appear in the often forgotten about show Get Real—she was one of the stars of it. It only aired for a year, and was about a family living in San Francisco. Anne played one of the older siblings. Also, hi Jesse Eisenberg!

We couldn't have said it any better ourselves, John!

You Might Also Like

• Jennifer Garner Swears By This Retinol Eye Cream

• These New Kicks Will Help You Smash Your Cross-Training Goals