File this under: the greatest thing you'll see all day. Eight years after Melissa Joan Hart said goodbye to Sabrina Spellman and her witchy ways, the former 'Sabrina the Teenage Witch' star spoofed her popular spellbinding role in a new video for Funny Or Die -- starring her former co-star, Salem the cat.

In the hilarious clip, the actress reunites with Salem (voiced by Nick Bakay) for lunch to catch up. But, then Salem -- always the bad influence -- convinces Hart to embrace her dormant inner-Sabrina and perform a little magic ... and that when Melissa loses it. She morphs into a power-hungry witch, attacking the restaurant's guests with "magic!"

And when a little boy tries to combat Melissa's witchy ways with the 'Harry Potter' defense spell, "Expelliarmus," the actress disarms him with her own clever counter-attack.