Just a few months ago, Mr Looker was given between a few weeks and months to live.
Facing that loss, Ms Looker and her fiance decided to bring their wedding forward and began fundraising to give Mr Looker access to an experimental drug that could prolong his life, though not save it.
Ms Looker said her dad was the best anyone could ask for.
Speaking after yesterday's ceremony, Mr Looker said it was fantastic walking his daughter down the aisle. "She looked absolutely stunning. It was a very proud moment."
At the beginning of November, Ms Looker, her brother Isaac, 21, and Mr Looker - who has worked as a nurse for more than 30 years - had returned from a month-long holiday in Sri Lanka, when Mr Looker was told he had two tumours in his bowel and an inoperable tumour in his pancreas.
Their holiday was so he could recover from a previous surgery and treatment for melanoma, which had been found on his forearm two years ago. In June he'd been through nearly a month of radiotherapy, and a tumour was surgically removed from his brain. " [The holiday] was basically just to recover from his radiation - just to give him a month to relax," Ms Looker said. "He was feeling quite good, he was looking really good, but when he got back he thought he'd just get a scan anyway ... and then they found them."
A specialist told Mr Looker about a drug called pembrolizumab that could help his immune system fight the cancer - prolonging his life, though not saving it. Pembrolizumab is not funded by Pharmac, nor is it approved by Medsafe. It needs to be administered every three weeks, at a cost of nearly $12,000 a session.
A Givealittle page was set up to help raise funds for the treatment. As of yesterday, $45,073.34 had been raised from 588 donations.
A date was set for the first session in the second week of December.
But the family had trouble getting the drug into the country, and before Mr Looker's appointment date came round, a tumour that was blocking his bowel had to be surgically removed.
Ms Looker said she saw fear and defeat in his eyes for the first time after the surgery.
"That's the hardest thing - knowing that he's terrified, not for himself, but for me and Isaac and his brother who lost his son earlier this year."
Faced with more delays accessing the drug, the family decided to seek treatment with a different drug at a world-leading hospital for melanoma in Sydney.
Last week, Mr Looker had his first round of treatment at the Mater Institute of Melanoma Australia - not pembrolizumab, but a similar immunotherapy drug called ipilimumab.
One session costs about $35,000. Mr Looker is scheduled to have three sessions of the drug before moving on to pembrolizumab. His next round is on January 8, with a third about two weeks later.
Q & A
What is ipilimumab?
Also known as Yervoy, ipilimumab is an immunotherapy drug, which is thought to work by helping boost the body's immune system.
What is it used for?
Ipilimumab is used to treat melanoma that has spread or is inoperable.
Does it work for everyone?
No. It can affect healthy cells, which could result in serious side effects in many parts of the body, which could lead to death.
How is it administered?
It's normally injected into the body through an intravenous line over 90 minutes.
How much does it cost?
The treatment is costing Grant Looker about $35,000 a round and he has three planned so far, at a cost of $105,000.
What if it doesn't work?
If, after several, the drug does not stop the growth of Grant's tumours, he will be changed to a different medication called pembrolizumab
