LOUISVILLE (ASSOCIATED PRESS) – Billy Crystal drew fast laughs when he took to the stage at Muhammad Ali's memorial service.

"We're at the halfway point," he joked. The memorial has been underway for more than 2½ hours after a morning full of remembrances.

He joked that he was clean shaven when the day's activities began.

Crystal is one of several high-profile guests giving eulogies.

Bryant Gumbel and former President Bill Clinton spoke after Crystal.