THEN AND NOW: The cast of '10 Things I Hate About You' 21 years later

Kat's antisocial attitude kept her friend group small and angered her younger sister, Bianca, who wasn't allowed to date until Kat did. Boys were afraid of Kat, which made it difficult for Bianca to find someone to date her sister.

Stiles broke out thanks to her role in "10 Things I Hate About You" and went on to star in movies including, "Save the Last Dance," "The Prince and Me," and "Silver Linings Playbook."

She's also known for playing Nicky in four "Jason Bourne" movies, starting with "The Bourne Identity."

She earned Golden Globe and Emmy nominations for starring on Showtime's "Dexter."

In 2019, the actress starred alongside Jennifer Lopez in "Hustlers," portraying the real-life journalist who wrote the story that inspired the film.

Stiles has been married to Preston Cook since 2017 and they have a son together named Strummer Newcomb Cook.

Bianca wanted to date Joey, so she tried to find someone to date her sister.

The show was canceled after two seasons.

Before "10 Things," Oleynik played the lead role on "The Secret World of Alex Mack." The teen star was also on "Boy Meets World" and "3rd Rock From the Sun."

Oleynik has had a number of guest roles since starring in "10 Things."

Her guest roles have included "Mad Men," "Hawaii Five-0," "Pretty Little Liars," and "Law and Order: Special Victims Unit."

He was hired to date Kat but ultimately fell for her anyway.

Ledger's career took off after "10 Things." He starred in movies including "A Knight's Tale," "Monster's Ball," "Lords of Dogtown," and "Casanova."

He earned his first Oscar nomination for "Brokeback Mountain" and won a posthumous Oscar for playing the Joker in "The Dark Knight."

His final role was in the movie "The Imaginarium of Doctor Parnassus."

Cameron instantly developed a crush on Bianca and tried to win her affection by finding her sister a date.

Before starring in "10 Things," Gordon-Levitt was known for "Angels in the Outfield," "Roseanne," and "3rd Rock From the Sun."

The actor has since earned two Golden Globe nominations for starring in "(500) Days of Summer" and "50/50."

His other roles include "Inception," "The Dark Knight Rises," "Don John," "Sin City: A Dame To Kill For," and "Snowden."

In addition, the actor had voice cameos in "Star Wars: The Last Jedi" and "Knives Out."

In 2020, he starred in the Netflix film "Project Power" alongside Jamie Foxx. He also has a role in the star-studded Aaron Sorkin film "The Trial of the Chicago 7."

Gordon-Levitt has been married to Tasha McCauley since 2014 and they have two sons.

Joey wanted to sleep with Bianca so he paid Patrick to date Kat.

Before "10 Things," Keegan starred on "Thunder Alley," "7th Heaven," and "Party of Five." Since then, he has had a few small roles on projects including "CSI: Crime Scene Investigation" and "Hollywood Darlings."

Full Circle held gatherings in the Rose Temple in Venice, California, but those ended in 2017 when they had some financial trouble. According to its Facebook page, the organization has since held a few pop-up events, with its last listed one occurring in December 2018.

Michael gave Cameron a tour of the school.

Krumholtz was known for playing Bernard the Elf in "The Santa Clause" before starring in "10 Things I Hate About You."

He's since appeared in "The Santa Clause 2," "Harold and Kumar Go to White Castle," "Superbad," "Hail, Caesar!," and "The Ballad of Buster Scruggs." He has also starred on "Numb3rs," "The Good Wife," and "Living Biblically."

More recently, Krumholtz guest-starred on "Awkwafina Is Nora From Queens," played Harvey Wasserman on HBO's "The Deuce," and appeared on the "Twilight Zone" reboot.

She went out with Joey after Bianca turned him down.

The show was canceled after two seasons.

"10 Things" was only Union's second movie, but she had starred on shows like "7th Heaven," "Sister, Sister," and "Clueless" before then.

Union broke out in "Bring It On," and her movie roles have included "Deliver Us From Eva," "Bad Boys II," and "Top Five." She also starred as the titular character on "Being Mary Jane."

Outside of acting, Union has been married to NBA star Dwyane Wade since 2014 and they welcomed their first child together, daughter Kaavia, via surrogate in 2018.

In November 2019, Union was allegedly fired from NBC's "America's Got Talent," where she was serving as a judge, for reportedly speaking out about racism on set.

She ended up dating Michael.

She starred in "Center Stage" and had minor roles on shows including "Charmed," "Private Practice," and "Masters of Sex."

Perky wrote erotic literature while at work.

Janney had already been working on-screen for 10 years when she was cast in "10 Things." Her breakout role on "The West Wing" earned the actress five Golden Globe nominations.

Some of her other roles include "Hairspray," "Juno," "The Help," "Spy," and voicing Peach in "Finding Nemo" and "Finding Dory." Janney also appeared in 2019's "Bombshell," based on the Fox News controversy centered on Roger Ailes.

More recently, Janney starred alongside Hugh Jackman in HBO's "Bad Education," a film based on a real-life embezzlement scandal that took place at a school in Long Island, New York.

Walter was an obstetrician and made Bianca wear a fake pregnancy belly.

The comedian is best known for starring in movies like "Pretty Women," "Runaway Bride," "The Princess Diaries," and "Get Smart."

Miller has also guest-starred on shows like "Curb Your Enthusiasm," "Shake It Up," and "Hot in Cleveland."

Mr. Morgan was an English teacher.

Mitchell is also known for starring on "The John Larroquette Show" and "Brothers" and in "Galaxy Quest" and "Inside Man."

The actor currently stars as Patton Plame on "NCIS: New Orleans" and was previously on "Fear the Walking Dead."