Reese WitherspoonSelma 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.

Blair and Gellar even recreated their movie kiss at the event.

Back with my girl @sarahmgellar . Still my favorite kiss. #bittersweetsymphony

A photo posted by Selma Blair (@therealselmablair) on

Witherspoon snapped a pic of the smiling trio for Instagram, writing: "Best girls night of the year!!! #cruelintentions."

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

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Witherspoon also 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

And the trio weren't content with just watching! Blair, Witherspoon and Gellar were both seen getting super into the show, and singing along to the musical.

Geller also posted 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: "#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 was "Secrets 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.

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.

Speaking of reunited costars...Michelle Pfeiffer's De Niro reunion a long time coming