Memba Them

After a dreadful 4th of July night back in 1996, a group of friends -- Sarah Michelle Gellar, Freddie Prinze Jr., Jennifer Love Hewitt, and Ryan Phillippe -- reconnect when they are faced with the killer consequences of their actions.

"I Know What You Did Last Summer" came out 24 years ago ... but the young cast in the slasher film haven't aged a bit. We don't know what you did last summer, but we sure know what you'll be doing this week for Halloween ... taking a look back at the cast of this iconic horror film!!

Scottish actor Shirley Henderson is best known for playing the ghostly girl Moaning Myrtle -- whose dramatic antics in the bathroom ... and later in a bubbly bathtub ... help the young magicians ward off dark spirits -- in the 2002 film "Harry Potter and the Chamber Of Secrets" and the 2005 installment "Harry Potter and the Goblet Of Fire."

Before her role on the fantasy films Henderson was cast as the party girl who still lived at home Gail in "Trainspotting" and the shy friend Jude in the three "Bridget Jones' films.

California native Larry Bagby was only 19 years old when he landed the role of the candy-hungry bully Ernie -- who terrorizes the streets of Salem and even shaves his nickname "ICE" into the back of his head -- on the classic 1993 Disney family fright film "Hocus Pocus."

The iconic witchy movie is brewed up with some A-list ingredients including Sarah Jessica Parker, Kathy Najimy and Bette Midler as the sorceress sisters Sarah, Winnie and Mary Sanderson ... and of course Tora Birch as the adorable Halloween lover, Dani Dennison.

Swiss socialite Jocelyn Wildenstein was already in her 50s when she pounced into headlines after her big divorce from the billionaire businessman Alec Wildenstein in 1999 ... but it was her feline facial features and unique animal print clothing that hailed Jocelyn the "Catwoman" of Hollywood.

While Jocelyn may have retracted her claws from the Los Angeles nightlife... Wildenstein still likes to live out her nine lives by curling up to her Instagram account and kneading out a picture puuuurrfect selfie every meow and then.

Psp, psp, psp, psp, psp.

English actor Harry Melling was only 12 years old when he landed the small role as the muggle cousin Dudley Dursley -- who makes home life hard for Harry Potter before he starts his magical schooling at Hogwarts -- in the 2001 fantasy film "Harry Potter and the Sorcerer's Stone."

Melling continued to be included in the 'Potter' series ... photographed above in "Harry Potter and and the Prisoner of Azkaban" ... and shared the big-screen with A-listers like Rupert Grint as the school BFF, Ron Weasley, Emma Watson as the quick-thinking, Hermione Granger ... and of course Daniel Radcliffe as the magical young man, Harry Potter.

Harry made a resurgence in the streaming world when he was cast as the chess mate Harry Beltik in "The Queen's Gambit" last year.

Brooklyn born actor Mitchell Whitfield was in his 20s when he took on the role of the best friend Stan Rothenstein -- who was one of the two youts behind bars after they were wrongly accused of murder while on their way to college on the west coast -- in the 1992 court comedy "My Cousin Vinny."

Whitfield was cast alongside some bright stars including Ralph Macchio as the innocent nephew, Billy Gambini, Marisa Tomei as the auto expert and fiance, Mona Lisa Vito ... and of course Joe Pesci as the unconventional lawyer, Vinny Gambini.

A few years later Mitchell landed a reoccurring gig as Barry Farber on the sitcom "Friends."

New Jersey-native Elizabeth Gillies was only 16 years old when she was cast as the evil artist Jade West -- who spread negativity and doom and gloom around the performers school Hollywood Arts -- in the Nickelodeon teen sitcom "Victorious" back in 2010.

The iconic show was filled with some young artists on the rise including Victoria Justice as the high school triple threat, Tori Vega, Daniella Monet as the senior sister, Trina Vega ... and of course Ariana Grande as the bubbly BFF, Cat Valentine.

Gillies can still be spotted on the small screen and is currently on "Dynasty" as Fallon Carrington.

Bronx-based choreographer Darrin Henson was in his mid-30s when he switched roles ... from the guy behind the camera credited with creating some of the best moves in the music industry ... to the instructor on the wildly popular how-to dance DVD's "Darrin's Dance Grooves" back in 2001.

Before his grooves were printed on his signature dance series, Darrin was responsible for the choreography for some of the biggest names in pop including Britney Spears, The Spice Girls and NSYNC.

Darrin can still be spotted on-screen with roles on television shows like "The Family Business" and "Double Cross."

Los Angeles local Alanna Ubach was only 25 years old when she was cast as the loyal brunette best friend and sorority sister Serena McGuire -- who lived alongside Elle at the Delta Nu house and supported her sister in her legal endeavors -- in the 2001 classic comedy "Legally Blonde" and the 2003 follow film "Legally Blonde: Red, White & Blonde."

Alanna shared the big screen role with some other awesome actors including Selma Blair as Warner's old/new girlfriend, Vivian ... and of course Reese Witherspoon as the law school success, Elle Woods.

Ubach has widened her scope to an impressive career in voiceover work on animated entertainment like "Puppy Dog Pals" and "Monsters At Work."

United Kingdom cameraman Adnan Ghalib was thrust into the limelight in late 2007 after he went from being behind the lens as one of the regular paparazzi swirling in Britney Spears' orbit ... into Brit's new mystery boyfriend in early 2008.

Complete with highly adorned Affliction shirts, on-trend Ed Hardy trucker hats and a signature flavor-saver strip of hair down the middle of his chin ... Adnan seemed inseparable from Britney Spears shortly after she split from Kevin Federline.

The Brit and Britney were often photographed driving aimlessly up and down Sunset Blvd, strutting hand in hand on Starbucks runs and even the occasional shopping spree for shutterbugs.

AG now lives a pretty private life that includes sharing sporadic shirtless pics on social media.

Los Angeles native Kaitlin Doubleday was only 20 years old when she was cast as the hot girlfriend and server Amy Presley -- who waits tables with a rag-tag group of misfits at Shenanigans -- in the 2005 funny film 'Waiting..."

The dining dramady was filled with huge stars on the rise including Justin Long as the apprehensive junior college server, Dean Saunders, Anna Farris as the fast-talking hottie, Serena Vowles, Ryan Reynolds as the coolest guy at Shenanigans, Monty Cook ... and of course John Francis Daley as the soft-spoken trainee-turned-GOAT, Mitch Haim.

Since her role in the restaurant comedy KD can be spotted on some major TV roles including "Empire" and "Nashville."

California-native Kelly Wiglesworth was only 23 when she was cast as the white-water rafting guide turned island castaway on the very first season of the reality competition show "Survivor: Borneo" back in 2000.

Wiglesworth was the runner-up of the OG 'Survivor' season losing out on her chance at the one million dollar prize to Richard Hatch who has been credited for creating alliances and gameplay within tribes that made the show what it is today.

KW returned for another run at the prize money on "Survivor: Cambodia" but was voted out 9th.

Canadian actress Rachelle Lefevre was in her 20's when she landed the role of the rebel vampire Victoria -- who plots to kill Bella after her coven leader James is destroyed -- in the 2008 fantasy film "Twilight" and the 2009 sequel "The Twilight Saga: New Moon."

Lefevre shared the screen with her coven cast including Edi Gathegi as the "vegetarian" vampire, Laurent ... and of course Cam Gigandet as the bloodthirsty leader, James.

In a surprise switch-up, Rachelle Lefevre was replaced in the final film "The Twilight Saga: Eclipse" by Bryce Dallas Howard.

Los Angeles local Susanna Hoffs was in her 20s when her life changed forever after her pop-rock band The Bangles released their sophomore album Different Light back in 1986 ... which featured the standout singles "Manic Monday," "If She Knew What She Wants" ... and the number one jam "Walk Like An Egyptian."

In their heyday, The Bangles was also comprised of other rocking artists including Vicki Peterson on lead guitar and vocals, Michael Steele (aka Micki Steele of The Runaways) on bass and backup vocals and Debbi Peterson on the drums.

Nebraska native Leslie Easterbrook was in her 30s when she landed the role as the sexy blonde Sergeant Callahan -- whose buxom bod is only matched by her serious school attitude towards the incoming cadets -- in the classic cop comedy "Police Academy" ... and the decade worth of sequels to follow!

The iconic funny films were also home to some other notable actors including Bubba Smith as the hilarious Hightower, David Graf as the gun-totting, Tackleberry ... and of course Steve Guttenberg as the troublemaking, Mahoney.

In the '80s Easterbrook could also be spotted on some big-name TV shows including "Laverne & Shirley" and "Ryan's Hope."

Oregon born artist Kim Rhodes was in her 30s when she landed the role of the melodic matriarch Casey Martin -- who had double duty as the mother to the twin boys and was also the Boston Tipton Hotel's lounge singer -- on the early 2000s Disney Channel sitcom, "The Suite Life Of Zack & Cody" and the 2008 follow-up "The Suite Life On Deck."

KR shared the small screen with some top-notch talent including Ashley Tisdale as the sweets-slanging, Maddie Fitzpatrick, Brenda Song as the hotel heir, London Tipton ... and of course, Dylan and Cole Sprouse as her adorable sons Zack and Cody Martin.