“My dreams have come true,” said Birmingham-born Whiley, who also won a doubles bronze medal at the London 2012 Paralympic Games with Lucy Shuker.
“I have literally dreamt of winning Wimbledon since I was a little girl.
“I hope my success can be an inspiration to other girls to encourage them to try tennis.”
Whiley and Kamiji, who had already won the Australian and French Open titles earlier this year, got the better of defending champions from the Netherlands Aniek van Koot and Jiske Griffioen 2-6, 6-2, 7-5 in a hugely enthralling encounter at The Championships to take the title out of Dutch hands for the first time in its six-year history.
An edgy first set saw the Dutch pair assert control and it looked like the title would once again be going their way after winning it in 2012 and 2013. But doubles world No.1 and No.2 Kamiji and Whiley regrouped at the start of the second and, after breaking at 2-2, didn’t look back to wrap up the set with four straight games.
Despite leading at 2-0 and 5-3 in the third, the momentum kept shifting and they found themselves tied at 5-5. But another break of serve meant Whiley was serving for the Championship and the duo claimed the title on their second match point with a superb lob from Kamiji.
Fellow Brits Lucy Shuker and Gordon Reid also finished their Wimbledon campaigns on a winning note after winning their third place play-off matches.
British No.1 Reid teamed up with Dutchman Tom Egberink to defeat Frederic Cattaneo from France and Belgium’s Joachim Gerard 6-2, 6-4.
Meanwhile, Shuker and Germany’s Sabine Ellerbrock won against German Katharina Kruger and Sharon Walraven from the Netherlands 6-3, 6-4.
The world’s best players will all be in action at the British Open Wheelchair Tennis Championships in Nottingham the week after next at the Super Series event from 15 – 20 July.