Reese Witherspoon, Sarah Michelle Gellar & Selma Blair have an amazing 'Cruel Intentions' reunion!

See the 'Cruel Intentions' Cast Epic Reunion!
See the 'Cruel Intentions' Cast Epic Reunion!

Reese Witherspoon, Selma Blair and Sarah Michelle Gellar, who played the three fatally dysfunctional main characters in the hit 1999 teen melodrama Cruel Intentions, were all smiles when they reunited in Los Angeles on Thursday.

Witherspoon snapped a pic of the smiling trio, which she posted to Instagram and captioned, "Best girls night of the year!!! #cruelintentions."

Best girls night of the year!!! #cruelintentions

A photo posted by Reese Witherspoon (@reesewitherspoon) on May 28, 2015 at 8:08pm PDT

The former co-stars met up to take in a performance of Cruel Intentions the Musical, a "completely unauthorized" musical parody featuring hits from the '90s.

PHOTOS: The Very Best TV, Movie and Music Reunions!

Witherspoon posted a photo from inside the performance, writing, "Sebastian and Kathryn reunite! #cruelintentionsmusical #90sflashback."

@sarahmgellar Sebastian and Kathryn reunite! #cruelintentionsmusical #90sflashback

A photo posted by Reese Witherspoon (@reesewitherspoon) on May 28, 2015 at 9:20pm PDT

Meanwhile, Gellar was commemorating the day with pictures as well. She snapped an equally adorable group pic from inside the theater...

#CruelIntentions @reesewitherspoon @therealselmablair #cruelintentionsmusical

A photo posted by Sarah Michelle (@sarahmgellar) on May 28, 2015 at 8:20pm PDT

As well as a #TBT pic of her and Cruel Intentions writer/director Roger Kumble, wishing the filmmaker a happy birthday.

Blair also wished Kumble a happy birthday with a throwback pic, captioning it, "#tbt To the day of #secretsociety dance on set of #cruelintentions. And a very happy birthday to the man who made that movie, one of my favorite people."

The only other main player from the '90s hit that didn't make it out wasSecrets and Lies star Ryan Phillippe. However, he did make it out to a staging of Cruel Intentions the Musical back in April, where he even showed off a sweet souvenir on Instagram.

єχ¢ιтє∂ тσ вє нєяє #cruelintentionsmusical

A photo posted by @ryanphillippe on Apr 17, 2015 at 7:58pm PDT

This was also the second time watching the musical for Gellar, who attended a different show in April alongside her Cruel Intentions co-star Sean Patrick Thomas. Gellar posted a video the next day with some of highlights from the production.

WATCH: Sarah Michelle Gellar on Resurrecting 'Buffy': Expectation Level Would Be 'Difficult' to Top

Gellar has been on a roll celebrating projects from her past in the last few weeks. Recently, the actress addressed the possibility of resurrecting her iconic vampire hunting valley girl. Check out the video below to see what the Cruel Intentions actress had to say about bringing back Buffy.

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