Credit: MOD/Splash News Online

Do Prince William's impending nuptials have his little brother feeling romantic?

Prince Harry reunited with on-again, off-again love Chelsy Davy at private London club Beaufort House on Saturday -- allegedly leaving together in the trunk of a Jaguar at 4 a.m. Sunday morning, according to British tabloid The Sun.

Zimbabwe-born Davy, 25, had flown into Great Britain on Friday after various travels throughout Africa. She's set to start training at a London-based law firm this year.

"Harry loves Chelsy," a source tells of the 26-year-old royal. "No matter what happens, he'll always go back to Chelsy. Harry says his time with Chelsy is always the happiest."

Royal watcher Katie Nicholl told Us last November that the exes were "back in touch" after an early fall 2010 split, when Davy moved back to South Africa. "They still care about each other deeply...Since Chelsy left for South Africa, Harry has been deeply missing her. They've been calling each other, emailing and Facebooking."

Adds Nicholl: "She is the most important person in his life. There was talk about other girls, but everyone around Harry knows that he only has eyes for Chelsy."