The couple recently rekindled their romance after a brief split and Hamilton wants to seal their relationship with marriage now, reports dailystar.co.uk.
"This will be the third time Lewis has planned to pop the question," said a source.
"But he believes this time is different. Both of them have benefited from the split, realising it's impossible for them to be without each other," the source added.
Hamilton plans to pop the question to his lady love post-Christmas.
"He wants to take Nicole to romantic Carmel and present her with the ring. There's no doubt in his mind, she'll say yes," a source said.
The couple has been dating for over two years.
--IANS (Posted on 05-12-2013)