The last track recorded for Grace, this originated from a jam. Buckley had sung some vocals as a reference but hadn't got round to writing proper lyrics.
Engineer Clif Norrell explained to Uncut magazine that Buckley asked him to help finish "Dream Brother" because the album deadline had passed and the vocals were uncompleted.
"Jeff was in Los Angeles, so they wanted him to get into a studio and finish the song," he said. "We had two days, but Jeff wanted to work on other songs first. On the final night, Jeff sang just the choruses of Dream Brother. He asked me what time it was, I said '11:00 PM', and he said, 'OK, I'll meet you back here at 1:00 AM!' He returned on time and sung the verses a few times and really nailed it. I realized he probably written those verses during the couple of hours he was out of the studio."