Daughter to a very rich family, Jubilee was raised in Venice. Her parents were murdered by some criminals while they were in their car. Luckily for her, Jubilee wasn't with them. The only option left to her was going to live with her neighbors, a couple of arrogant people, so she preferred to run away and lived alone in the streets.

Her mutant power consists of producing what she calls fireworks, a sort of plasma energy that she can direct towards any target. The fact is that, although she is able to change the intensity of this energy, she is afraid to use it at full strength (once, she blew up a house) so she had joined Generation X to get a better control of her powers (Jubilee's power has been explained as the ability to detonate things on a molecular level).

While wandering in a commercial center in the USA, she followed the X-Women to Australia through a gate of Gateway, hiding herself in the complex where they lived, so when the whole team disappeared through the Perilous Siege and Wolverine was caught by The Reavers, she helped him to escape, following him everywhere for a long time. Later, when Wolverine lost his adamantium skeleton and left the group, she stayed with the X-Men, though feeling a little out of place, until the Phalanx arrived. Then she joined Banshee, Emma Frost and Sabretooth (the only -good??- mutants available in the mansion). She fought it, saving the butts of the next generation of mutants. After the Phalanx was defeated, they all founded a new team, Generation X, intended to train the youngsters and keep them out of trouble. Or at least do the best they can.