He's known for his sense of humor, but Andy Samberg is officially as serious as can be about Joanna Newsom. He's engaged to his girlfriend of five years!

Details on the proposal are scarce, but an insider tells Us Weekly that Samberg was smitten with the singer-songwriter before the two even met.

"He liked her music and would go to her shows," the friend told the tabloid.

"He had the biggest crush on her."