Ronnie "Woo Woo" Wickers (born October 31, 1941) is a longtime Chicago Cubs fan and local celebrity in the Chicago area. He is known to Wrigley Field visitors for his idiosyncratic cheers at baseball games, generally punctuated with an exclamatory "Woo!" (e.g., "Cubs, woo! Cubs, woo! Big-Z, woo! Zambrano, woo! Cubs, woo!") Longtime Cubs announcer Harry Caray dubbed Wickers "Leather Lungs" for his ability to shout for hours at a time.

Wickers grew up on the South Side of Chicago. Born premature and abused by his mother, he was raised by his grandmother, who brought him to his first Chicago Cubs games during the late 1940s. Wickers explained in a 2004 Chicago Tribune interview that he started "wooing" in 1958 or 1959. "It just came to be. I had fun with it," he remarked. He has remained a fixture at Wrigley Field ever since, even singing "Take Me Out to the Ball Game" during a May 24, 2001 game. In 2005, filmmaker Paul Hoffman released a documentary film about Wickers, called WooLife. The film premiered at the Chicago Historical Society.