The couple split this past April after two years together, but insiders tell Us that the breakup didn't last. Harry, 30, spent Tuesday night, Sept. 16, and Wednesday night, Sept. 17, with Bonas, according to eyewitnesses.
Prince William's younger brother first hung out with the socialite, 25, at London's Odeon Cinema on Tuesday, where they reportedly took in a screening of Jason Segel and Cameron Diaz's movie, "Sex Tape."
The following night, the two Brits mingled at Harry's birthday party at Clarence House, where they were seen dancing with one another. Earlier this month, Cressida also attended the opening and closing ceremonies of the Invictus Games, which Prince Harry led.
When Harry and Bonas first broke up earlier this year, a source told Us that it likely wasn't the definite end of the relationship. "They're off, but I don't think it's for good," the source said at the time. "They hit a rocky patch and this decision is the result of that. Harry is the type to want to take breathers and then try again."
Another insider noted in April that it was hardly a messy breakup, saying, "It's very amicable."
During his time apart from Bonas, the redheaded royal was linked to various women, including Camilla Thurlow, with whom he had a summer fling.
MORE ON WONDERWALL: