The Forgetting Sarah Marshall star, more commonly associated with TV series How I Met Your Mother, contacted Kim Ledger, the father of the late actor, to let him know that he is there for his granddaughter, six-year-old Matilda Rose, as well as her mother Michelle Williams.

Williams, of Dawson’s Creek and My Week With Marilyn fame, and the Ledger family endured a battle after Ledger’s tragic death in 2008, arguing over inheritance and who should get his various awards.

However they have recently buried the hatchet and her partner Segel is hoping they can all get along.

A source told website RadarOnline: "Jason got on the phone and introduced himself to Kim, and then invited the Ledgers to use his home whenever they wanted to fly in from Australia to visit Michelle and Maddie.

"Kim was blown away by Jason's generosity and the two hit it off right away. Now Kim's given his blessing for Jason to marry Michelle and be a stepdad to Matilda."

Williams and Ledger amicably ended their three-year relationship in September 2007, and the following January he died of an accidental overdose of prescription drugs.

He was awarded a posthumous Academy Award for Best Supporting Actor for his role as The Joker in director Christoper Nolan’s Batman film The Dark Knight.

Segel and Williams have been dating since the beginning of the year.