Then: David Hasselhoff
David Hasselhoff is one of the world's most familiar faces - all thanks to his Baywatch fame.
The star made his broadway debut a decade after his Baywatch role, playing the title role for Jekyll & Hyde. In 2006 he became a co-host for America's Got Talent - going on to judge the contest for the second, third and fourth series!
He's also had constant television roles - including reprising his role in television movie Knight Rider in 2008.