Robin Williams fulfilled a bucket list wish for a 21-year-old New Zealand mother with terminal cancer before taking his own life on Aug 11.

Vivian Waller, who is currently in an Auckland hospice, was diagnosed with lung, bowel and liver cancer in January. After learning about her devastating cancer diagnosis, she made a bucket list that had five wishes on it: She wanted to tie the knot with her partner, Jack, celebrate her 21st birthday, see her daughter Sophie celebrate her first birthday, travel to Rarotonga in the Cook Islands, and meet the late comedian-actor Williams, according to Sunday Star Times.

But since Vivian was too ill to fly from New Zealand to the US to try meeting the late Oscar-winning actor, one of her friends reached out to the "Good Will Hunting" star. Surprisingly, he responded with a brief video clip which he emailed to Waller's family a few months ago.

Jack said his wife was thrilled with the heartwarming, personal video message from the actor, who himself was also struggling with depression and Parkinson's disease before he committed suicide.

"Hi Vivian, it's Robin Williams here, saying 'Hey girl what's going on down there in New Zealand?'" Williams is seen asking at the beginning of the 17-second video in an unmistakable jolly tone while putting on a thick Kiwi accent, according to Today.

Switching to his real speaking voice, he adds: "Sending all my love to you, Jack, and Sophie. Mark this off your bucket list."

Then the "Dead Poet Society" actor throws in one more impression: "It's all right, it's all right, it's all right," he says, impersonating Matthew McConaughey's Southern twang.

Williams caps off his message, saying, "Much love to you, baby," before blowing a kiss to the camera.

Jack has yet to reveal Williams' suicide to his wife, as he finds the sad news too hard to bring up. He said that his wife is still fighting, but is resigned due to the fact that chemotherapy is no longer an option.

"Viv struggles with a lack of energy and it is quite difficult for her to concentrate," he said. "We are just enjoying the time we have together. We take things a day at a time."

Jack married Vivian in February after a fundraiser paid for the wedding. A couple of months after, Sophie celebrated her first birthday. The only remaining wish Vivian has yet to cross off her bucket list is her planned trip to Rarotonga.

Jack said that he decided to publicize Williams' personal message to her wife because "we love him, we want to show people how awesome a person he was."

Called by some as "comedic Mother Theresa," Williams also chartered a plane once to visit a terminally-ill girl and would call to cheer up sick patients, New York Daily News reported.

Watch Williams' personal message to Vivian below: