The Duchess of Cambridge, who christened her own son Prince George in October, quietly joined a church service on Sunday to become a godmother. William, Kate and little George took their seats at the St. Barnabas church in Essex among about 50 others -- who weren't necessarily expecting royalty. Though it was a christening for friends of the Cambridges, the service was open to the public.

"I think my usual congregation were surprised at who was joining us," Reverend Ken Dunstan told the Daily Mirror. George was reportedly very well behaved (how Princely of him!) and stayed with dad William while Kate stepped up to join her friends during the ceremony. The baby's parents, friends of Kate and William from their time at St. Andrews University, weren't sure at first if Kate would be able to be there.

"The couple said they wanted four godparents but weren't quite sure whether one would be available," Reverend Dunstan explained, "Then later the father rang me to say the other godmother is available, it's a friend from uni. Then he told me who it was."

"She was there as a godparent, not as a princess." - Reverend Dunstan

We imagine he was a touch more nervous when he realized that the future Supreme Governor of the Church of England (and his heir) would be in attendance! Many at the church were reportedly friends from St. Andrews, so it must have been a fun reunion for all. No pictures have surfaced, but we're just dying to know what both Kate and little George wore to the service. The Duchess was likely rocking a fascinator, and we imagine Georgie had on a smart little suit!

Later that evening, William was guest of honor at the BAFTA Awards, and the following day Kate joined the Queen to welcome stars from the stage and screen to Buckingham Palace (wearing her red Alexander McQueen dress). Isn't it great that this high-profile, glamorous couple can switch so quickly from quiet moments with friends to dazzling evenings out? Ah, a day in the life of a royal.

Click through the gallery above to see photos from George's christening day!