The private service to pay tribute to the 28-year-old, who was found dead in New York last month, took place at the Sony lot in L.A. on Saturday and also included a variety of figures from the movie industry and Ledger's agency, CAA.
Attendees included Cruise and Holmes, who co-starred with Ledger's former fiancée Michelle Williams on TV show Dawson's Creek, and British actress Miller, who worked with Ledger on 2005 film Casanova, according to People.com.
The memorial comes a week after relatives and close friends of the tragic star gathered at a smaller service at the Westwood Village Memorial Park cemetery in the city. A service also took place in New York, which attracted close to 1,000 mourners.
Ledger was found dead in his New York apartment on Jan. 22. An autopsy failed to reveal the cause of death, and police are still awaiting the results of a toxicology test to asses if drugs found in his apartment played a part in his demise.
His body has been flown to his native Australia, where a private funeral is expected to take place in his hometown of Perth.
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