AmEx cardholders enrolled in the company's rewards program can now use their credit card points to pay for Uber rides or earn double the amount of points when they pay for rides using their AmEx. The Uber receipt will show how many points were redeemed or earned at the end of the ride.
The rewards program is currently only available for iPhone users in the U.S.
Uber is currently a private company, but has been valued by investors at $18.2 billion.
2014: The Year in Fashion [PHOTOS]