Jim Carrey and Cathriona White 'looked really happy' on their final date together

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Jim Carrey and Cathriona White's Last Romantic Date -- See the Photos

Cathriona White and Jim Carrey were in high spirits on what may have been their final date before she was found dead in an apparent suicide.

A source tells ET the two looked smitten as they gazed adoringly at each other, hugged and kissed on a secluded balcony table overlooking the ocean at Nobu restaurant in Malibu, California, on Sept. 19," where they spent about two hours.

WATCH: Jim Carrey and Late Girlfriend Cathriona White -- A Timeline of Their Relationship Over the Last 3 Years

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According to the source, Carrey and White constantly looked into each other's eyes, both initiating PDA throughout the night.

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WATCH: Cathriona White's Final Note Includes Jim Carrey's Name, Pills Found by Her Bed, Says Coroner

"They looked really happy together," another onlooker tells ET, saying the actor and photographer seemed to be sharing "a very romantic meal."

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WATCH: Jim Carrey Spotted Out 4 Days Before Late Girlfriend Cathriona White's Death

Cathriona shared two photos from the evening. "Before going for a wonderful belated birthday dinner at Nobu in Malibu last night," she captioned her selfie. She also shared a picture of the iconic Nobu menu.

#sushi #nobu #birthday #sunsets #food #california #malibu 😋

A post shared by Cat white (@littleirishcat) on

Nine days later, White was found dead in her home on Monday night, Carrey reportedly visited with her sister on late Wednesday night. The 53-year-old actor was seen publicly for the first time since White's death on Thursday afternoon, when he was being driven en route to his Los Angeles, California home.

"Jim is doing everything he can to help," a source tells People of Carrey helping White's family during this difficult time. "He is devastated, but can't imagine how her family must feel."

WATCH: Jim Carrey Visits With Late Girlfriend Cathriona White's Sister

Following the news of White's death her family released a statement to the Irish Independent.

"The family of Cathriona White sincerely regret the untimely passing of their beloved daughter and sister," they said. "Cathriona was a shining light in our lives who was loved deeply by her entire family. We will miss her terribly and at this difficult time we ask to be left in private to mourn our loss."

Photos of Jim Carrey from over the years:

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Jim Carrey and Cathriona White 'looked really happy' on their final date together
SATURDAY NIGHT LIVE -- 'Jim Carrey' Episode 1666 -- Pictured: (l-r) Jim Carrey and Iggy Azalea on October 23, 2014 -- (Photo by: Dana Edelson/NBC/NBCU Photo Bank via Getty Images)
SATURDAY NIGHT LIVE -- 'Jim Carrey' Episode 1666 -- Pictured: (l-r) Jim Carrey and Aidy Bryant on October 21, 2014 -- (Photo by: Dana Edelson/NBC/NBCU Photo Bank via Getty Images)
WESTWOOD, CA - OCTOBER 11: Jim Carrey arrives at the Hammer Museum's 'Gala In The Garden' Honoring Joni Mitchell And Mark Bradford at Hammer Museum on October 11, 2014 in Westwood, California. (Photo by Steve Granitz/WireImage)
WEST HOLLYWOOD, CA - OCTOBER 06: (L-R) Director Peter Bogdanovich and Actor Jim Carrey attend 'As You Wish' Book Launch at Pearl's on October 6, 2014 in West Hollywood, California. (Photo by Ari Perilstein/Getty Images for El Cuarton Films)
WEST HOLLYWOOD, CA - OCTOBER 06: (L-R) Actress Selma Blair and Actor Jim Carrey attend 'As You Wish' Book Launch at Pearl's on October 6, 2014 in West Hollywood, California. (Photo by Ari Perilstein/Getty Images for El Cuarton Films)
INGLEWOOD, CA - AUGUST 24: Jennifer Lopez and Jim Carrey attend the 2014 MTV Video Music Awards at The Forum on August 24, 2014 in Inglewood, California. (Photo by MTV/MTV1415/Getty Images for MTV)
INGLEWOOD, CA - AUGUST 24: Actors Jim Carrey and Jeff Daniels perform onstage at the 2014 MTV Video Music Awards at The Forum on August 24, 2014 in Inglewood, California. (Photo by Jason LaVeris/FilmMagic)
INGLEWOOD, CA - AUGUST 24: Jeff Daniels and Jim Carrey attend the 2014 MTV Video Music Awards at The Forum on August 24, 2014 in Inglewood, California. (Photo by MTV/MTV1415/Getty Images for MTV)
THE TONIGHT SHOW STARRING JIMMY FALLON -- Episode 0072 -- Pictured: (l-r) Host Jimmy Fallon, actor Jeff Daniels and actor Jim Carrey during the 'Fake Arms: Burger Joint' skit on June 10, 2014 -- (Photo by: Douglas Gorenstein/NBC/NBCU Photo Bank via Getty Images)
NEW YORK, NY - APRIL 27: Jim Carrey, guest and Susan Sarandon attend the Philadelphia Flyers vs New York Rangers playoff game at Madison Square Garden on April 27, 2014 in New York City. (Photo by James Devaney/GC Images)
THE OSCARS® - THEATRE - The Academy Awards® for outstanding film achievements of 2013 will be presented on Oscar Sunday, MARCH 2 (8:30 p.m. - 12:00 a.m., ET/5:30-9:00 p.m., PT), at the Dolby Theatre® at Hollywood & Highland Center® and televised live on the ABC Television Network. (Photo by Adam Taylor/ABC via Getty Images)
HOLLYWOOD, CA - MARCH 02: Actor Jim Carrey speaks onstage during the Oscars at the Dolby Theatre on March 2, 2014 in Hollywood, California. (Photo by Kevin Winter/Getty Images)
BEVERLY HILLS, CA - FEBRUARY 27: Actor Jim Carrey arrives at the David Lynch Foundation Gala Honoring Rick Rubin at the Beverly Wilshire Hotel on February 27, 2014 in Beverly Hills, California. (Photo by Kevin Winter/Getty Images)
WEST HOLLYWOOD, CA - JANUARY 23: Recording Artist Steven Tyler and Actor Jim Carrey arrive at 1 OAK LA Grand Opening With Special Performance By Steven Tyler at 1 OAK on January 23, 2014 in West Hollywood, California. (Photo by Michael Bezjian/WireImage)
BEVERLY HILLS, CA - JANUARY 12: 71st ANNUAL GOLDEN GLOBE AWARDS -- Pictured: Actor Jim Carrey poses in the press room at the 71st Annual Golden Globe Awards held at the Beverly Hilton Hotel on January 12, 2014 -- (Photo by Kevork Djansezian/NBC/NBC via Getty Images)
LOS ANGELES, CA - OCTOBER 26: Actor Jim Carrey signs copies of his new children's book 'How Roland Rolls' at Barnes & Noble bookstore at The Grove on October 26, 2013 in Los Angeles, California. (Photo by Jason LaVeris/FilmMagic)
TORONTO, ON - OCTOBER 06: Jim Carrey attends his book signing for 'How Roland Rolls'at Indigo Yorkdale on October 6, 2013 in Toronto, Canada. (Photo by Isaiah Trickey/FilmMagic)
TORONTO, ON - OCTOBER 06: Jim Carrey hosts a signing for his children's book 'How Roland Rolls' at Indigo at Yorkdale Mall on October 6, 2013 in Toronto, Canada. (Photo by Jag Gundu/Getty Images)
NEW YORK, NY - OCTOBER 05: Actor Jim Carrey promotes the new book 'How Roland Rolls' at Barnes & Noble Union Square on October 5, 2013 in New York City. (Photo by Gilbert Carrasquillo/FilmMagic)
ATLANTA, GA - SEPTEMBER 29: Actor Jim Carrey looks on prior to the start of the game between the Atlanta Falcons and the New England Patriots at Georgia Dome on September 29, 2013 in Atlanta, Georgia. (Photo by Kevin C. Cox/Getty Images)
HOLLYWOOD, CA- APRIL 27: Actor Jim Carrey attends actress Jane Fonda's Handprint/Footprint Ceremony during the 2013 TCM Classic Film Festival at TCL Chinese Theatre on April 27, 2013 in Los Angeles, California. (Photo by Jeffrey Mayer/WireImage)
HOLLYWOOD, CA - MARCH 11: Jim Carrey arrives at the 'The Incredible Burt Wonderstone' - Los Angeles Premiere at TCL Chinese Theatre on March 11, 2013 in Hollywood, California. (Photo by Steve Granitz/WireImage)
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WATCH: Jim Carrey Spotted for First Time Since Late Girlfriend Cathriona White's Death

"She was a truly kind and delicate Irish flower, too sensitive for this soil, to whom loving and being loved was all that sparkled," Carrey told ET in a statement on Tuesday. "My heart goes out to her family and friends and to everyone who loved and cared about her."

It is unclear whether Carrey was still dating White at the time she died. The actor was spotted out at a Hollywood art show on Sept. 24, four days before White was found dead. A source tells ET that Carrey spent most of the night chatting in small circles, but was "definitely acting single," and TMZ reports this as the day the two split up.

White's death remains under investigation. Assistant Chief Coroner Ed Winter tells ET that several notes were found at White's home, including one addressed to Carrey.

WATCH: Jim Carrey and Cathriona White's Last Vacation Together -- See the Beautiful Photos

If you or someone you know needs help, please call the National Suicide Prevention Lifeline at 1-800-273-TALK (8255).

Jim Carrey and Cathriona White: A Relationship Timeline
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