Jamie Kennedy stars as the brilliant but bizarre Dr. Callahan on NBC's new drama "Heartbeat."

An actor, producer and comedian, Kennedy's recent work includes starring roles in the latest installment of the "Tremors" film franchise, Chris Carter's "The X-Files" and Amazon's drama pilot "The After." He is also voicing multiple characters on the new Comedy Central animated series "Legends of Chamberlain Heights."

Kennedy had a recurring role as a sleazy boxing manager on "Kingdom" for DirecTV and was a voice actor on Fox's "The Cleveland Show." In all, he can be seen on more than 190 hours of television on several broadcast and cable networks.

Kennedy landed his big break when he was cast in Baz Luhrmann's "Romeo + Juliet," alongside Leonardo DiCaprio, as a punked-out rival to John Leguizamo. His career soon kicked into high gear as he co-starred in Wes Craven's "Scream" and its follow-up, "Scream 2."

Kennedy has worked alongside some of the biggest names in Hollywood, including Steve Martin in "Bowfinger" and Jack Nicholson in the Oscar-nominated "As Good as It Gets." In 2002, Kennedy created "The Jamie Kennedy Experiment," which became The WB's highest-rated show at the time. Kennedy portrayed a number of wacky characters, but the audience's favorite was Brad Gluckman, the white rapper from Malibu. A year later, Kennedy brought Gluckman to the big screen in "Malibu's Most Wanted."

Other film credits include "Three Kings," directed by David O. Russell; "Enemy of the State," directed by Tony Scott; and "Boiler Room," opposite Vin Diesel.

Kennedy can also be seen performing his stand-up show around the country.