David Cassidy (left) and Zac Efron
11/09/2008 AT 11:55 AM EST
Veteran '70s heartthrob David Cassidy of The Partridge Family
has some sound advice for the hottie of High School Musical
, Zac Efron
: Don't lose your head.
"All I can say to Zac is that as long as he does good work, doesn't lose his mind and stays grounded as a human being, he'll be fine," Cassidy, 58, tells Britain's Daily Mail
as he is about to embark upon a U.K. concert tour.
"But he'd better fasten his seatbelt because it's going to be a very bumpy ride."
David Cassidy, in the '70s
With hair thinning and a few wrinkles to reflect the passage of time, Cassidy nonetheless is still recognizable as the onetime pinup boy whose posters were splayed across bedrooms on both sides of the Atlantic. This time, however, his visit to Britain isn't being punctuated by the screams of thousands of hysterical girls surrounding his hotel.
Still, as Cassidy points out, the secret to longevity in show business isn't merely about having an adoring public. Rather, "it's … about the talent, and never about how many fans or photographers you've got outside your home."