Robin Williams' son, Zak, on father's death: 'I miss him all the time'

Robin Williams' Son, Zak, on Father's Death: 'I Miss Him All the Time'

Following the unexpected death of Robin Williams, the actor's oldest son Zak, 31, is still having a hard time coping.

In a new interview with People, Zak gives some insight into how he and his sister Zelda, 25, and younger brother Cody, 23, are still reeling from the loss of their father, who took his own life on Aug. 11 at age 63.

"I miss him all the time," Zak says. "Often I see something or if I'm watching a film, I think, 'Oh, man, he would have appreciated this' or 'He would have gotten a laugh out of this.'"

PHOTOS: Robin Williams' 10 Most Memorable Quotes

"There's not a day that goes by that we don't think about our dad," he adds.

Zak now says he is dealing with the tragedy by honoring his father's spirit of giving back.

"It's through helping others that I've begun to heal," he says.

Zak echoed those sentiments when ET spoke to him in November at the Christopher and Dana Reeve Foundation fundraising gala in New York.

34 PHOTOS
Robin Williams, in memoriam
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Robin Williams' son, Zak, on father's death: 'I miss him all the time'
NEW YORK - NOVEMBER 18: Zak Williams and Robin Williams attend the Timo Pre Fall 2009 Launch with Interview Magazine at Phillips De Pury on November 18, 2008 in New York City. (Photo by Jamie McCarthy/WireImage for Timo Wallets LLC)
Robin Williams with son Zak & wife Marsha during 'Death To Smoochy' Premiere at Ziegfeld Theatre in New York City, New York, United States. (Photo by Jim Spellman/WireImage)
SAN FRANCISCO, CA - OCTOBER 26: Zak Williams, son of Robin Williams, throws out the ceremonial first pitch as Zelda and Cody Williams look on before Game Five of the 2014 World Series between the San Francisco Giants and the Kansas City Royals at AT&T Park on October 26, 2014 in San Francisco, California. (Photo by Elsa/Getty Images)
Robin Williams, son Zak & wife Marsha during 'Death To Smoochy' Premiere at Ziegfeld Theatre in New York City, New York, United States. (Photo by Jim Spellman/WireImage)
Robin Williams with son Zak & wife Marsha during 'One Hour Photo' Premiere at Academy Theatre in Beverly Hills, California, United States. (Photo by Gregg DeGuire/WireImage)
Portrait of actor Robin Williams, Marin County, California, 1999. (Photo by Chris Felver/Getty Images)
NEW YORK, NY - AUGUST 12: A makeshift memorial for Robin Williams seen in front of Carolines on Broadway comedy club on August 12, 2014 in New York City. (Photo by Cindy Ord/Getty Images)
Robin Williams in the kitchen in a scene from the film 'Mrs. Doubtfire', 1993. (Photo by 20th Century-Fox/Getty Images)
You're a grown man now and I'm so proud of you. A little bit of you will always be my "Mr Pym". Happy Birthday, @zakpym!
Happy Birthday to me! A visit from one of my favorite leading ladies, Crystal.
Robin Williams visits a sick child in a scene from the film 'Patch Adams', 1998. (Photo by Universal/Getty Images)
#tbt and Happy Birthday to Ms. Zelda Rae Williams! Quarter of a century old today but always my baby girl. Happy Birthday @zeldawilliams Love you!
JIMMY KIMMEL LIVE - Emmy Award-nominated 'Jimmy Kimmel Live' airs every weeknight (11:35 p.m. - 12:41 a.m., ET), packed with hilarious comedy bits and features a diverse lineup of guests including celebrities, athletes, musicians, comedians and humorous human interest subjects. The guests for TUESDAY, NOVEMBER 12 included actor Robin Williams ('The Crazy Ones'), Sarah Hyland, Ariel Winter, Nolan Gould, Rico Rodriguez and Aubrey Anderson-Emmons ('Modern Family') and musical guest The Killers - also featuring Jimmy Kimmel Lives' 'Modern Family Feud: Kids Edition.' (Photo by Randy Holmes/ABC via Getty Images) ROBIN WILLIAMS, JIMMY KIMMEL
LOS ANGELES - SEPTEMBER 5: 'Breakfast Burrito Club' -- Left to Right: Sydney (Sarah Michelle Gellar), Zach (James Wolk), Simon (Robin Williams) and Andrew (Hamish Linklater) delve into each other'™s personal lives while brainstorming ideas for an ad campaign, on THE CRAZY ONES, Thurs. Oct. 17 (9:01 -“ 9:31 PM, ET/PT) on the CBS Television Network. (Photo by Richard Cartwright/CBS via Getty Images)
LOS ANGELES - SEPTEMBER 5: 'Breakfast Burrito Club' -- Simon (Robin Williams) brainstorms ideas for an ad campaign for the breakfast burrito, on THE CRAZY ONES, Thurs. Oct. 17 (9:01 9:31 PM, ET/PT) on the CBS Television Network. (Photo by Richard Cartwright/CBS via Getty Images)
THE TONIGHT SHOW WITH JAY LENO -- Episode 1515 -- Pictured: (l-r) Actor Robin Williams, host Jay Leno during an interview on December 22, 1998 -- (Photo by: Margaret Norton/NBC/NBCU Photo Bank via Getty Images)
Robin Williams, Zelda Williams and Cody Williams at the Mann's Chinese Theatre in Hollywood, California (Photo by Ron Galella, Ltd./WireImage)
HOLLYWOOD, : Academy Award-winning actor Robin Williams wears a clown nose as he places his hands in cement during his hand and footprint ceremony outside Mann's Chinese Theatre 22 December in Hollywood, California. Williams is currently starring in the critically acclaimed film 'Patch Adams' about a doctor who uses humor to help heal his patients. AFP PHOTO/Vince BUCCI (Photo credit should read Vince Bucci/AFP/Getty Images)
Arnold Schwarzenegger & Robin Williams during The 13th Annual Moving Picture Ball American Cinematheque Award Honoring Arnold Schwarzenegger at Beverly Hilton Hotel in Beverly Hills, California, United States. (Photo by SGranitz/WireImage)
BEVERLY HILLS, UNITED STATES: Academy Award winning actor Robin Williams signs autographs for fans as he arrives for the premiere of his new film, 'What Dreams May Come' 28 September in Beverly Hills, CA. The film, a romantic-fantasy based on the Richard Matheson novel, tells of one man's journey to other worlds to find the woman he loves. AFP PHOTO Vince BUCCI (Photo credit should read Vince Bucci/AFP/Getty Images)
Off to the Emmys with my beautiful wife, Susan.
LOS ANGELES, UNITED STATES: Oscar winners Robin Williams (L), Best Supporting Actor and Jack Nicholson (R), Best Actor pose for photographers 23 March at the 70th Annual Academy Awards at the Shrine Auditorium in Los Angeles. Williams won for his roll in 'Good Will Hunting' and Nicholson for 'As Good As It Gets.' (ELECTRONIC IMAGE) AFP PHOTO/Hector MATA (Photo credit should read HECTOR MATA/AFP/Getty Images)
Robin Williams is covered in paint in a scene from the film 'What Dreams May Come', 1998. (Photo by Polygram Filmed Entertainment/Getty Images)
324574 35: Robin Williams stands with Matt Damon at the fourth annual Screen Actors Guild Awards ceremonies March 18, 1998 in Los Angeles, CA. Various actors and entertainers attended the ceremonies to honor the accomplishments of their fellow performers. (Photo by Russell Einhorn/Liaison)
FRIENDS -- 'The One with the Ultimate Fighting Champion' Episode 24 -- Pictured: (l-r) Billy Crystal as Tim, Robin Williams as Thomas, Jennifer Aniston as Rachel Green, Matthew Perry as Chandler Bing, Lisa Kudrow as Phoebe Buffay (Photo by Paul Drinkwater/NBC/NBCU Photo Bank via Getty Images)
Nathan Lane and Robin Williams standing in pajamas on the porch in a scene from the film 'The Birdcage', 1996. (Photo by United Artists/Getty Images)
Bonnie Hunt, Bradley Pierce, Kirsten Dunst and Robin Williams hold each other in a scene from the film 'Jumanji', 1995. (Photo by TriStar/Getty Images)
BEVERLY HILLS, CA - JANUARY 23: U.S. actor Robin Williams holds his Golden Globe after winning for best actor in a comedy for his role in 'Mrs. Doubtfire' 22 January 1994. The movie also won a Golden Globe for best comedy film. (Photo credit should read DAVID CRANE/AFP/Getty Images)
Robin Williams and Tim Robbins in a scene from the film 'Cadillac Man', 1990. (Photo by Orion Pictures/Getty Images)
UNITED STATES - MARCH 16: Robin Williams (Photo by The LIFE Picture Collection/Getty Images)
Getting ready for The Tonight Show with The Man, @jayleno. Jay got me my first paying stand-up job.
UNITED STATES - MARCH 16: Robin Williams (Photo by The LIFE Picture Collection/Getty Images)
NEW YORK - SEPTEMBER 26: Robin Williams and Charlie Rose on CBS This Morning on Thursday, Sept. 26, 2013 on the CBS Television Network. (Photo by Heather Wines/CBS via Getty Images)
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Robin's son attended the fundraising gala to take part in honoring his father, and celebrating his friendship with the late actor Christopher Reeve.

"We're doing okay. We're working hard to build our strength and acclimating to the new normal," he told ET about how he and his family have been holding up. "A large part of what we're doing through this grieving process is giving and spending time focusing on others."

VIDEO: Zelda Williams Gets a Stunning Tattoo in Memory of Robin Williams

Watch the video below to hear Zac talk about the outpouring of support they've received from Williams' many fans.

Robin Williams' Son Speaks Out for First Time Since Dad's Death

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