The most recent incident of a tragic celebrity death was the sudden passing of Whitney Houston at the Beverly Hilton on Feb. 11. She is believed to have died from a lethal combination of prescription drugs and alcohol.

Here is The Extra List of some of Hollywood's biggest players who died from drug-related complications.

Michelle Williams, this year's winner of the Golden Globe Best Actress Award for her role in "My Week with Marilyn," covers the February issue of GQ (looking very much like the legendary blonde bombshell)... and she talks about her late ex, Heath Ledger, who died four years ago January 22.

Here are some highlights from the interview:

Why she believes she and Heath Ledger were drawn to each other:
"Our initial meeting, the circumstances of how we first met, were cosmic or something. Yeah, a lot of things happened at once. It's a bit like: We had a lot of things to do, because we didn't have a lot of time, or something."

Actress Naomi Watts is on the cover of October's More magazine, in which she opens up about the two years she spent with ex-boyfriend Heath Ledger, who died in early 2008 after an accidental prescription drug overdose.

"We had a beautiful relationship, only a couple of years, but he was a man who was completely full of joy, and there was a lot of laughing and affection. He was really a very special soul and made a great impact on my life. And a great actor, but I know there was so much more to come. And it's a tragedy for his little daughter."

It's been nearly three years since the death of actor Heath Ledger -- and Michelle Williams has opened up for the first time about her love of three years and the father of her daughter, Matilda, 5.

"I've found meaning around the circumstance, but the actual event itself still doesn't... I can't find a meaning for it," she told "Nightline" in an interview that aired Wednesday. "I can find meanings in things and people and relationships that have sprung up, and friendships that have strengthened. I can find a lot of meaning in that, but not in why."

In a shocking revelation from the Lindsay Lohan tapes, the actress' mother confirms that Lohan, 23, was "dating" Heath Ledger when he died in January 2008.

In an undated phone conversation obtained by RadarOnline.com, Dina tells her ex-husband Michael, "I don't know if you know that, but I know 'cause I would drop her off and they were friends very, very close, okay?"

Check out more of Hollywood's nastiest family feuds

Lindsay's mother goes on to say that she believes the actor's death "f---ed" the starlet up -- and she was afraid that without intervention, Lindsay could share Ledger's fate.

"Because when she's drunk or takes an Adderall with it she will do something like Heath Ledger did in a second without thinking," Dina tells Michael.

Heath died in January 2008 of an accidental drug overdose. Four months prior to his death, he had separated from his fiancée Michelle Williams -- with whom he had daughter Matilda, 4.

See Heath's life in photos

Dina also vocalizes her concern about Lindsay's up-and-down relationship with Samantha Ronson -- and wonders if Lindsay will ever be able to cut ties with the deejay.

"It's very easy for a rational person to say. But for an irrational person who has a problem with her DNA and alcohol and Adderall and asthma and every other things she's got wrong with her," she says.

Michael told reporters earlier this week that he would continue to release recordings about his daughter "until Lindsay goes to rehab."

"The Imaginarium of Doctor Parnassus" was Heath Ledger's final film, and co-star Verne Troyer has only positive things to say about being on set with the fallen star.

"I feel so honored and privileged to be a part of the film," Troyer told "Extra" at the AFI Fest screening of the fantasy film. "Being able to work with Heath was one of the greatest things that I've ever gotten to be able to do."

Click here to watch the trailer for "The Imaginarium of Doctor Parnassus."