Continuity mistake: In the scene where Louis is transforming into a vampire, he finally stops crawling around and lies on the ground. There are two leaves in his hair on either side of his head. We then see a shot of Lestat and then back to Louis and the leaves are gone. (00:13:40)

Interview with the Vampire: The Vampire Chronicles (1994)
Ending / spoiler
Directed by: Neil Jordan
Starring: Brad Pitt, Tom Cruise, Antonio Banderas, Christian Slater, Kirsten Dunst, John McConnell, Virginia McCollam
After the interview, Malloy (Slater) tries to persuade Louis (Pitt) to give him his blood so he may become a vampire as well. Louis intimidates Malloy, asking him if his story of pain and suffering was not enough to persuade him, then holds him by his throat to the ceiling before disappearing.Malloy hops into his car and drives off, listening to the tape of the interview when he is pulled into the backseat and bitten by Lestat (Cruise) who finally recovers completely thanks to Malloy's blood. Ejecting the tape, he weaves his web of deceit on Malloy, giving him the same offer he made to Louis centuries earlier...
Slater
Louis: Lestat killed two, sometimes three a night. A fresh young girl, that was his favorite for the first of the evening. For seconds, he preferred a gilded beautiful youth. But the snob in him loved to hunt in society, and the blood of the aristocrat thrilled him best of all.
Trivia: Kirsten Dunst (Claudia) had her first on screen kiss, with a much older Brad Pitt, in this film.





Answer: Lestat was quite vain; his disfigurement was most likely the reason he stayed hidden as long as he did. Also, his true age is uncertain, so 100 years could be an insignificant amount of time to him.