The lucky rider was Marvin, whose driver, Ara, took him on a £5 uberX ride through London on Christmas Eve, the company said.
The car: a blue Honda Insight Hybrid.
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“This holiday season, we’re feeling grateful and festive crossing this milestone as we close out the year,” the company said in a news release.
For being the billionth rider, Uber will give Marvin a year’s worth of free Uber rides, while Ara gets a vacation anywhere Uber serves.
Uber also said it will make a donation to the Hackney Pirates, a literacy nonprofit that serves the area of London where the billionth trip began.