LOS ANGELES, April 6 — Bill Murray made a surprise appearance on The Daily Show yesterday to help Malaysian-born comedian and actor Ronny Chieng celebrate a major milestone: becoming a US citizen.

Chieng was mid-monologue when the legendary actor, comedian, and writer casually strolled on stage from backstage — much to Chieng’s shock and the audience’s delight.

“Oh, how are you?” Chieng exclaimed, laughing as Murray walked up to shake his hand.