The actor, known for playing Leonard "Lenny" Kosnowski on the '70s sitcom "Laverne and Shirley" and David St. Hubbins in the rock mockumentary "This Is Spinal Tap," is currently starring in the Broadway production of Gore Vidal's play "The Best Man."
McKean has starred in a number of Broadway productions, including "Hairspray," "The Homecoming" and "The Pajama Game."
According to his representative, this will mark the first time in the actor's career that he has missed a performance.
