David Hasselhoff, best known to audiences for his work on TV's "Baywatch" and "Knight Rider," will join the London cast of On July 16 the actor will begin a stint as slick lawyer Billy Flynn in the Kander and Ebb musical, which plays West End's Adelphi Theatre. Hasselhoff will be making his London theatre debut in the hit revival. The 51-year-old performer made his Broadway debut in Frank Wildhorn's Copyright � 2002 Playbill, Inc. All Rights Reserved.