Bette Midler shares 1st look at 'Hocus Pocus' reunion with Sarah Jessica Parker, Kathy Najimy

The trio of stars are reuniting on Halloween for a good cause.

"Your 3 fav witches - @sarahjessicaparker @kathynajimy & ME - are returning for 1 night only on 10/30 at 8p ET! 'In Search of the Sanderson Sisters' is the best thing to happen to #Halloween since 'Hocus Pocus' + Reese's Pieces," she wrote on Instagram.

In the behind-the-scenes snap, Midler, 74, Parker, 55, and Najimy, 63, are all smiles and wearing their costumes from the beloved 1993 movie while acting positively witchy in front of a blue screen.

The trio are reprising their respective characters of Winifred, Sarah and Mary -- aka the Sanderson sisters -- for a virtual Halloween fundraising event called Hulaween, which benefits the New York Restoration Project.

Elvira, Mistress of the Dark, is hosting the celebration, which includes guests such as "Hocus Pocus" stars Thora Birch (Dani Dennison), Omri Katz (Max Dennison) and Doug Jones (William Butcherson), to name a few.

More information about and tickets for the event can be found here.