The following October, at the World Championships in London, England, Rebecca qualified in first place into the all-around final. She also qualified second on uneven bars and eighth on floor exercise. She fell on her beam dismount in preliminaries, which prevented her from qualifying on that event. In the all-around final, Rebecca led the competition going into the final rotation by a sizeable margin, having received the top scores of the competition on both bars and beam. Needing only a 12.925 to clinch the gold, she fell on her final tumbling pass on floor and just missed that score (the judges awarded her a 12.875). Her teammate Bridget Sloan claimed the gold, while Rebecca took the silver. Rebecca tied Romania's Ana Porgras for the bronze medal in the uneven bars event final, as well as in the floor final, where they both placed fifth.