Three brothers decided to give their sister the most memorable dentist visit ever — with the prank of a lifetime. 

After their sister Millicent visited the dentist to have her wisdom teeth removed, her brothers, Cabot, Hudson and Barrett Phillips, convinced her that a zombie outbreak had hit their city. They also got a little help from their mother and the dentist — who were both in on the prank. 

Everything was captured on video that has gone viral. 

RELATED: VIRAL VIDEO: Cat reacts to having its teeth brushed for first time

During a ride home from the dentist, the brothers had a friend create a fake emergency alert message from the Center for Disease Control and played it over the car radio.

“State and local officials have reported cases of high fever, nausea, death and even cannibalism.”

Here is where the fun begins.

After a call to their mother — who is in on the prank and can confirm the “zombie attack” — Millicent becomes confused, worried and goes into a frenzy. 

When her brother tells her she can only take one pet ­ — the cat or the dog ­— to escape to Mexico for safety from the zombies, Millicent responds, “The cat, you idiot!”

Watch the video to see one of the greatest pranks ever played on a sibling. It also proves that if there was ever a zombie apocalypse, Millicent would be the best companion to have.

The original video was posted yesterday and has over 1.5 million views.