More stars have been paying tribute to the late Heath Ledger, including ex-girlfriend Naomi Watts, fellow Oscar nominee Phillip Seymour Hoffman and agent Steve Alexander.

Following Michelle Williams’ lead, Watts said of her former flame: "His acting was just so touching, so connected in truth. I think he was just getting started."

Seymour Hoffman, who met Ledger when they were both nominated for the Best Actor Oscar in 2006, describes the actor's "childlike enthusiasm," adding, "His body was always in motion."

Heath’s agent Alexander also spoke of his client to Interview magazine, painting the picture of a the Brokeback Mountain actor as a "rolling stone".

Ledger suffered a fatal accidental overdose of prescription drugs in his New York apartment at the start of the year.