"When I asked her, you know, we'd never talked about it.... There wasn't like a, 'Maybe we should get married' [conversation]. I dropped it on her!," he said.
The 54-year-old actor popped the question at home, and had even "cued up a playlist" of some of his aunt Rosemary Clooney's songs, reported E!Online.
"I asked her, and she just kept saying, 'Oh my, God,' and 'Wow,' and we just sat there," he said. "And finally, I just said, 'Listen, I'm 53 at the time, or 52 at the time, I think (he proposed prior to his birthday last year, so he was indeed 52). I said, 'I've been on my knee for about 28 minutes so I gotta get an answer out of this because I'm gonna throw a hip out!," he said.