George Clooney showed off his singing skills at the Carousel of Hope Awards in Los Angeles on Saturday night by nervously joining Neil Diamond for a rendition of "Sweet Caroline."

The crooner spotted Clooney in the audience and decided to give him the opportunity to duet with him.

The reluctant movie star, who was honored with the Brass Ring Award at the gala, seemed far from comfortable at first, but then joined Diamond for the finale of the song when the singer urged him to "sing the last line with me."

A smiling Clooney agreed and sang "Sweet Caroline."