"I'm really happy for him and proud we'll get three representatives from our organization," Astros manager Brad Mills said.
Coleman, in his 34th year with the Astros, will serve as the strength and conditioning coach for both the NL and the American League for the Midsummer Classic on July 10 in Kansas City.
"They called me back when we were in Los Angeles three or four weeks ago and said they were considering having me doing it and wanted to know if I was going to be interested in doing it, and I said, 'Yes,'" Coleman said.
Coleman will leave for Kansas City on Sunday with his wife, Barbara, while their son, Jarrett, plans to meet his parents in Kansas City for the event.
"I've seen lots of players go, and it's nice to finally be able to go," he said. "I told Altuve he had to go so I could have somebody to stretch at the All-Star Game."