It took the Romanian just 56 minutes to beat the 23-time Grand Slam champion.
Halep triumphed 6-2 6-2 in ruthless style.
This saw the 27-year-old take her second Grand Slam title, after winning the French Open in 2018
“Never,” Halep said when asked if she had ever played better than that by Sue Barker on the BBC.
“I had nerves. My stomach was not very well. But I knew there was no time for emotions.
“It feels unbelievable. It is something so special and I will never forget this day.”