Heath Ledger's former girlfriend Michelle Williams is reportedly planning to make a film of the late actor's life

The actress is said to be keen to keep his memory alive for the sake of their two-year-old daughter Matilda.

"It makes Michelle's heart ache that Matilda was so young when Heath died and she's unlikely to retain any memories of her father," a source tells the Australian Daily Telegraph.

"She (Williams) wants to keep his spirit alive with something Matilda can treasure all her life."

The proposed film will feature friends and colleagues sharing their memories of the Brokeback Mountain star.

Ledger died in January in his New York apartment from an accidental overdose of prescription drugs.

Remembering Heath Ledger