‘Teen Witch’ Costars Robyn Lively and Mandy Ingber Reunite: Photo

Can't top that! Robyn Lively and Mandy Ingber, who costarred as besties Louise and Polly in the cult 1989 classic Teen Witch, reunited on Sunday, May 15 — and it was glorious.

Lively, who is Blake Lively's older half sister, attended an event celebrating Ingber's new book, Yogalosophy for Inner Strength: 12 Weeks to Heal Your Heart and Embrace Joy, at the Ron Robinson flagship store in Santa Monica.

Mandy Ingber and Robyn Lively
Mandy Ingber (left) and Robyn Lively attend the launch party for Ingber's new book, 'Yogalosophy for Inner Strength.' Randy Shropshire/Getty Images

"It's #LOUISEandPOLLY!! Reunited!" Lively, 44, captioned an Instagram photo of the longtime friends. "Never to part again! Bound by love, friendship and #yogalosophy! So proud of my girl @mandyingber! What a beautiful person inside and out! This book is a MUST! Love her! #TOPTHAT."

Mandy Ingber and Robyn Lively
Mandy Ingber (left) and Robyn Lively in 'Teen Witch.'

Lively and Ingber were a part of several memorable Teen Witch scenes. Polly (thanks to a spell concocted by her sorceress pal Louise) unforgettably rapped the catchy "Top That" tune to her high school crush, Rhet (Noah Blake). Louise, meanwhile, only had eyes for Brad Powell (Dan Gauthier).

Dan finally noticed Louise (sorry, Randa!) when she developed supernatural powers on her 16th birthday. She made a love potion, which also helped her shed her nerd status. She instantly became the most popular girl in school — with great fashion style to boot!

Lively stuck with acting following the beloved movie, racking up guest roles in shows such as The Mentalist, It's Always Sunny in Philadelphia, 30 Rock and Nip/Tuck. Ingber took a break from Hollywood to become a yoga instructor. Some of the fitness expert's celebrity clients have included Jennifer Aniston, Kate Beckinsale, Helen Hunt, Courteney Cox, Jennifer Meyer and Brooke Shields.

Ingber's latest book is a follow-up to her 2013 book Yogalosophy: 28 Days to the Ultimate Mind-Body Makeover. On Sunday, Chelsea Handler, Ricki Lake, Joely Fisher and Melora Hardin also joined Ingber for her book signing, a special yoga class and snacks and refreshments provided by Owl’s Brew and Essentia water and Beaming. After the workout, the group also enjoyed frozen yogurt, thanks to local shop Treat.

On Tuesday, Lively also shared that she and Ingber reunited with their Teen Witch costars Gauthier, Lisa Fuller (Ronda) and Joshua John Miller (Richie Miller).

"Sooo… THIS happened!!! AHHHH!! #Louise #Polly #Bradtheredhotlover #Randa and #Richie! The cast of #Teenwitch REUNITE for the DVD commentary! It was pure #MAGIC!!" she wrote. "#nevergonnabethesameagain #yourmorningpapah Can't #topthat Love u guys! We did this for all of YOU!! Woohoo!! #BestdayEVERRRRR."

Sign up now for the Us Weekly newsletter to get breaking celebrity news, hot pics and more delivered straight to your inbox!

Want stories like these delivered straight to your phone? Download the Us Weekly iPhone app now!