Born and raised in South Philadelphia
Commuted to NYC from Philadelphia to study acting with Stella Adler
On way to appointment with Columbia Pictures eastern talent scout Joyce Selznick in NYC's Brill Building met Selznick in elevator; not knowing who he was, she was impressed with his look and presence and suggested he meet with her; signed to contract with Columbia
Feature acting debut, "Rumble on the Docks"
Played Jeff 'Moondoggie' Matthews opposite Sandra Dee's "Gidget"; first of four films with director Paul Wendkos (a fellow Philadelphian); sang the songs "Gidget" and "The Next Best Thing To Love"
Portrayed Eddie Sirota in "The Gene Krupa Story"; sang "Let There Be Love" in film
Reteamed with Wendkos for "Because They're Young", starring Dick Clark as an understanding, do-good teacher
Registered impressively as slum kid who keeps his head high and becomes a concert pianist in "Let No Man Write My Epitaph"
Acted in Wendkos' "Gidget Goes Hawaiian", this time opposite Deborah Walley
Joined all-star saboteur gang of Gregory Peck, Anthony Quayle, David Niven, Anthony Quinn and Stanley Baker in J Lee Thompson's "The Guns of Navarone"
Received Grammy Award nomination (Best Rock and Roll Recording) for "Goodbye Cruel World"
Played native Hawaiian in love with Yvette Mimieux in "Diamond Head"; when her irate father, bigoted pineapple baron Charles Heston, "accidentally" kills Darren, she then takes up with his brother (George Chakiris)
Final turn as 'Moondoggie' (opposite Cindy Carol) in Wendkos' "Gidget Goes to Rome"
Starred with Robert Colbert as time-travelling scientists in the ABC series "The Time Tunnel"
Reached the Top 40 with "All"
Made the charts again with "You Take My Heart Away"
Last feature to date, Bobby Roth's engaging independent "The Boss' Son"
Portrayed veteran patrolman Jim Corrigan, Heather Locklear's partner, on "T.J. Hooker"; when ABC cancelled series in the spring of 1985, CBS picked it up for its final season
Made directorial debut with an episode of "T.J. Hooker" (CBS) near the end of its final season
Began working exclusively as a director, helming episodes of series like "Hunter", "The A-Team", "Stingray", "Hard Ball" (all NBC), "Werewolf" (Fox), "Raven" and "Walker: Texas Ranger" (both CBS)
Helmed "Gladiator School" (ABC), a "Police Story" TV-movie
Directed episodes of Fox's "Beverly Hills, 90210"
Reteamed with Locklear, directing her in episodes of Fox's "Melrose Place"
Received star on the Philadelphia Walk of Fame (September 25)
Recurring role as hologramic Vegas lounge singer Vic Fontaine in ten episodes of the syndicated "Ster Trek: Deep Space Nine" revived singing carreer
Returned to "Melrose Place", this time acting the role of villain Tony Marlin
Released 13th album, "This One's From the Heart"